OpenLLM-France/wikimedia huggingface dataset:
# Nonlinear finite elements/Newton Raphson method
## The Newton-Raphson method

The Newton-Raphson method is a technique used to find the roots of nonlinear algebraic equations. The method is also called Newton's method.
Let us revisit Newton's method of finding roots in the context of an equation with one degree of freedom. Let the nonlinear equation be
    $f(x)=0~.\,$
We wish to find one root of the equation (recall that if $f(x)\,$ is linear or quadratic, we can find the root in exact form).
Let us select a point $x_{1}\,$ on the curve (see Figure 1). The slope of the curve at point $x_{1}\,$ is $df(x_{1})/dx\,$. Therefore, the equation of the tangent to the curve at $(x_{1},f(x_{1}))\,$ is
    $y-f(x_{1})={\cfrac {df(x_{1})}{dx}}(x-x_{1})~.$
At $y=0\,$, the tangent meets the $x\,$-axis at $x_{2}\,$. Therefore we have
    $-f(x_{1})={\cfrac {df(x_{1})}{dx}}(x_{2}-x_{1})\qquad \implies \qquad x_{2}=x_{1}-{\cfrac {f(x_{1})}{df(x_{1})/dx}}~.$
Recall that the root of $f(x)\,$ is the point where the curve of the function meets the $x\,$-axis. Therefore, we can repeat the process until we arrive at the root. The Newton iteration scheme is given by
    ${x_{r+1}=x_{r}-{\cfrac {f(x_{r})}{\cfrac {df(x_{r})}{dx}}}~.}$
* Figure 1. Newton's method of finding roots.
The iterative procedure is terminated when the following condition is met:
    $|x_{r+1}-x_{r}|<\epsilon \,$
where $\epsilon$ is a small value that depends on the desired accuracy and on machine precision. The Newton-Raphson method gives a quadratic convergence rate. That is, the difference between the answer and the approximate solution is proportional to the previous difference squared. This can be seen by Taylor expanding the non-linear equation and its derivative around the root, and inserting this into the expression for $x_{r+1}\,$.
# Nonlinear finite elements/Newton method for finite elements
## Newton's method for nonlinear finite elements

The finite element approximation of a nonlinear boundary value problem results in a system of nonlinear equations of the form
    $K(u)u=f$
Here, K is a nonlinear function relating the nodal degrees of freedom and the internal nodal forces and f is the externally applied nodal forces. Now the problem is to find the values of the nodal degrees of freedom such that the above equation is satisfied. In general the above equation does not have a close form solution (or some algorithm to find the closed form solution), hence we resort to numerical root finding methods to find an approximate solution. Newtons method is commonly used solution procedure for the solution of system simultaneous nonlinear equations. We rewrite the above equation in the form $g(x)=0$
    $g(u):=K(u)u-f$
Then, the Newton iteration formula can be written as
    ${\begin{aligned}u_{r+1}&=u_{r}-[{\cfrac {dg(u_{r})}{du}}]^{-1}g(u_{r})\\&=u_{r}-T^{-1}g(u_{r})\end{aligned}}$
The tangent stiffness is given by
    $T={\cfrac {dg(u_{r})}{du}}$
The iterative procedure is terminated when either the residual is very small or the difference between successive solutions is less than a specified tolerance.
However, both the residual $\mathbf {r}$ and the solution $\mathbf {u}$ are vectors. We usually compare the $L_{2}$ (Euclidean) norm of the vectors with a tolerance $\epsilon$. In symbolic form, we check the norm of the residual using
    $\lVert \mathbf {r} \rVert _{2}\leq \epsilon \qquad {\text{or}}\qquad {\sqrt {\mathbf {r} \cdot \mathbf {r} }}\leq \epsilon \qquad {\text{or}}\qquad {\sqrt {\sum _{i=1}^{n}r_{i}^{2}}}\leq \epsilon ~.$
For the difference between successive solutions we check
    ${\cfrac {\lVert \mathbf {u} _{r+1}-\mathbf {u} _{r}\rVert _{2}}{\lVert \mathbf {u} _{r+1}\rVert _{2}}}\leq \epsilon \qquad {\text{or}}\qquad {\cfrac {\sqrt {(\mathbf {u} _{r+1}-\mathbf {u} _{r})\cdot (\mathbf {u} _{r+1}-\mathbf {u} _{r})}}{\sqrt {\mathbf {u} _{r+1}\cdot \mathbf {u} _{r+1}}}}\leq \epsilon \qquad {\text{or}}\qquad {\cfrac {\sqrt {\sum _{i=1}^{n}(u_{i}^{r+1}-u_{i}^{r})^{2}}}{\sqrt {\sum _{i=1}^{n}(u_{i}^{r+1})^{2}}}}\leq \epsilon ~.$
# MDLD/converge absolutely (R)

Start=converge absolutely (R) Target=Real series/Absolute convergence/Definition
# MDLD/composition

Start=composition Target=Mapping/Composition/Definition
# MDLD/continuously differentiable (higher R)

Start=continuously differentiable (higher R) Target=Differentiable functions/R/Higher derivatives/Introduction/Section
# MDLD/composite mapping

Start=composite mapping Target=Mapping/Composition/Definition
# MDLD/continuous functions (R)

Start=continuous functions (R) See=continuous function (R) MDLD/continuous function (R) Target=Real function/Continuity in a Point/General/Definition
# MDLD/continuously differentiable (R)

Start=continuously differentiable (R) Target=Continuously differentiable/R/Definition
# MDLD/composition (map)

Start=composition (map) Target=Mapping/Composition/Definition
# MDLD/continuous (R)

Start=continuous (R) Target=Real function/Continuity in a Point/General/Definition
# MDLD/continuous function (R)

Start=continuous function (R) Target=Real function/Continuity in a Point/General/Definition
# MDLD/converge (R)

Start=converge (R) Target=Real numbers/Sequence/Limit and convergence/Definition
# President of the United States/John Quincy Adams

| 4th President | 5th President | 6th President | 7th President | 8th President |
| James Madison 1809 - 1817 | James Monroe 1817 - 1825 | John Quincy Adams 1825 - 1829 | Andrew Jackson 1829 - 1837 | Martin Van Buren 1837 - 1841 |
# President of the United States/Millard Fillmore

| 11th President | 12th President | 13th President | 14th President | 15th President |
| James Polk 1845 - 1849 | Zachary Taylor 1849 - 1850 | Millard Fillmore 1850 - 1853 | Franklin Pierce 1853 - 1857 | James Buchanan 1857 - 1861 |
# President of the United States/Richard Nixon

| 35th President | 36th President | 37th President | 38th President | 39th President |
| John F. Kennedy 1961 - 1963 | Lyndon B. Johnson 1963 - 1969 | Richard Nixon 1969 - 1974 | Gerald Ford 1974 - 1977 | Jimmy Carter 1977 - 1981 |
# President of the United States/Martin Van Buren

| 6th President | 7th President | 8th President | 9th President | 10th President |
| John Quincy Adams 1825–1829 | Andrew Jackson 1829–1837 | Martin Van Buren 1837–1841 | William Henry Harrison 1841 | John Tyler 1841–1845 |
# President of the United States/Ronald Reagan

| 38th President | 39th President | 40th President | 41st President | 42nd President |
| Gerald Ford 1974 - 1977 | Jimmy Carter 1977 - 1981 | Ronald Reagan 1981 - 1989 | George H. W. Bush 1989 - 1993 | Bill Clinton 1993 - 2001 |
# President of the United States/Quiz on The Washington Presidency 1789-1799

Back to America's First Five Presidents: 1789 to 1828
# President of the United States/John Tyler

| 8th President | 9th President | 10th President | 11th President | 12th President |
| Martin Van Buren 1837 - 1841 | William Henry Harrison 1841 | John Tyler 1841 - 1845 | James Polk 1845 - 1849 | Zachary Taylor 1849 - 1850 |
President John Tyler (March 29, 1790 – January 18, 1862) became the first Vice President to be sworn into the presidency after a death in office. He served his term from 1841-1845. He was described as an "old school", Southern gentleman (as he was born in Virginia). He attended William & Mary in Williamsburg, Virginia and was the governor of Virginia (1825-1827) and a US Senator for VA (1827-1836). His personality was described as "stubborn".
John Tyler wasn't a favorable presidential candidate even for his own party, the Whigs. He was expelled from his own party, forced his whole cabinet to resign (except for Daniel Webster as he was negotiating a contract and couldn't leave), forced Congress to seriously consider impeachment processes, and he annexed Texas - spawning a war with Mexico. He was not asked to go for the presidency again by his party.
He died due to years of poor health. He is buried in Hollywood Cemetry in Richmond, Virginia alongside James Monroe and Jefferson Davis.
# President of the United States/Lyndon B. Johnson

| 34th President | 35th President | 36th President | 37th President | 38th President |
| Dwight D. Eisenhower 1953 - 1961 | John F. Kennedy 1961 - 1963 | Lyndon B. Johnson 1963 - 1969 | Richard Nixon 1969 - 1974 | Gerald Ford 1974 - 1977 |
# President of the United States/Rutherford B. Hayes

| 17th President | 18th President | 19th President | 20th President | 21st President |
| Andrew Johnson 1865 - 1869 | Ulysses S. Grant 1869 - 1877 | Rutherford B. Hayes 1877 - 1881 | James Garfield 1881 | Chester Arthur 1881 - 1885 |
# Informal learning activities/BPxMo

Buildings & Placesː M⇒ O__  O ther initialsː   Ac  Df
 Gi  Jl
(«»Mo⇑⇑)
 Pr
 Su  Vz
*  Maluku Phlpns
(Islands)   •  Matmata Tns
(⇓village)   •  Matamoros Mxc
(city)  
*  Melbourne Englnd
(Castle)  
*  Monyash Englnd
(village)  
*  Murcia Spn
(Region)
Buildings & Placesː N__
*  Neversink USA
(River)  
*  Ngorongoro Tnz
(District)  
*  Numidia Algr
(kingdom )
Buildings & Placesː O__
*  Ogeechee USA
(River)  
*  Opava CzchR
(city)   •  Opelika USA
(city)  
*  Orissa Ind
(state)   •  Orpington Englnd
(town)   • Orizaba USA
(USS)  
*  Otley Englnd
(town)  
*  Ozarks USA
(mountains)
# Informal learning activities/Bb

Bblcl
This inserts a link to the country or area, in this case Biblical, into a Places & Buildings item.
# Informal learning activities/BPxVz

Buildings & Placesː V⇒ Z__  O ther initialsː   Ac  Df
 Gi  Jl
 Mo  Pr
 Su
(«»Vz⇑⇑)
*  Valparaíso Chl
(city)   •  Viterbo Itly
(comune)   •  Vltava Bhm
(river)   •  Vologda Rsa
(city)   •  Vršac Srb
(city)
Buildings & Placesː W__
*  Walla Walla Astrl
(town)  
* Wensum Englnd
(River)  
*  Wuppertal Grmny
(city)
Buildings & Placesː X__
*  Xinjiang Chn
(Region)  
* Xochimilco Mxc
(Lake)
Buildings & Placesː Y__
*  Yaguarón Prguy
(city)   •  Yalta Ukrn
(resort)   •  Yamoussoukro IvryCst
(city)   •  Yarm Englnd
(city )  
*  Yell Sctlnd
(Sound)   •  Yellowknife Cnd
(city )  
*  Yoho Cnd
(Park)   •  Youghal Irlnd
(town)
Buildings & Placesː Z__
*  Zaragoza Spn
(city)  
*  Zonguldak Trky
(city)
# Informal learning activities/Bc

Bctr
This inserts a link to the country or area, in this case Bactria, into a Places & Buildings item.
# Informal learning activities/BPxJl

Buildings & Placesː J⇒ L__  O ther initialsː   Ac  Df
 Gi
(«»Jl⇑⇑)
 Mo  Pr
 Su  Vz
*  Jeju SthKr
(Island)   •  Jenolan Astrl
(Caves)  
*  Jumna Ind
(river)
Buildings & Placesː K__
* Kaaba SdArb
(Stone)   •  Kairouan Tns
(city)   •  Kampinos Plnd
(Park)   •  Kilbroney NIrlnd
(Park)   •  Kari-Kari Blv
(caldera)  
*  Kesh Irlnd
(Caves)  
*  Kilmarnock Sctlnd
(burgh)  
*  Knutsford Englnd
(town)
Buildings & Placesː L__
*  Lambaesis Algr
(town )   •  Laputa ??  
(island )  
*  Lechuguilla USA
(Cave)   • Ledenburg Grmny
(Schloss)   •  Leighlinbridge Irlnd
(Castle)  
*  Lierne Nrwy
(municipality)
# Informal learning activities/BPxPr

Buildings & Placesː P⇒ R__  O ther initialsː   Ac  Df
 Gi  Jl
 Mo
(«»Pr⇑⇑)
 Su  Vz
*  Perranzabuloe Crnwl
(hamlet)  
*  Pike Place USA
(Market)   •  Pisidia Trky
(region )  
*  Polish EErp
(Corridor)  
*  Prokletije EErp
(alps)  
*  Putana Blv
(volcano)
Buildings & Placesː Q__
*  Qaasuitsup Grnlnd
(municipality)  
*  Quincy USA
(Market)   • Quinsigamond USA
(Lake)   •  Quintin Frnc
(hamlet)
Buildings & Placesː R__
*  Rabbitkettle Cnd
(Hot Springs)  
* Rotorua NZ
(Lake)  
*  Ruthwell Sctlnd
(village)
# Informal learning activities/BPxSu

Buildings & Placesː S⇒ U__  O ther initialsː   Ac  Df
 Gi  Jl
 Mo  Pr
(«»Su⇑⇑)
 Vz
*  Scutari Albn
(Sanjak)  
*  Sfax Tns
(port)  
*  Sicyon Grc
(city )   •  Simplon Swzlnd
(Pass)   •  Siskiyou USA
(Mountains)  
*  Skiddaw Englnd
(mountain)  
*  Spica MlkyWy
(star)   •  Split Crt
(city)  
*  Stillorgan Irlnd
(suburb)  
*  Suakin Sdn
(port)
Buildings & Placesː T__
*  Tarawa PcfOcn
(atoll)   • El  Tatio Chl
(geyser)  
*  Tenerife Spn
(island)  
*  Timgad Algr
(city )   •  Timișoara Rmn
(city)   •  Tiskilwa USA
(village)  
*  Trafford Englnd
(Park)   •  Triborough USA
(Bridge)  
*  Tuileries Frnc
(Palace)
Buildings & Placesː U__
*  Urquhart Sctlnd
(Castle)  
*  Utrecht Nthrlnds
(city)
# Informal learning activities/BR

BltcRgn
This inserts a link to the country or area, in this case the Baltic Region, into a Places & Buildings item.
# Physics for beginners/01-introduction

NOTICE: I am aware that the pdf file for this chapter is missing some pages. That will be easy to fix.--Guy vandegrift (discuss • contribs) 09:13, 10 October 2019 (UTC)

#### Announcements

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
* To read other works by this author visit http://www.thenatureofthings.info/index.html

## CONTENTS

* Click for link to Physics for beginners as a single pdf file
# Physics for beginners/04-energy

* If no energy is lost to heat, it remains constant is potential energy stored in the spring is exchanged with kinetic energy of mass in motion during each cycle.
* This is what thermal energy "looks" like: Random motion and random compression of atoms behaving almost as springs.
* More heat flows out of something hot than flows into something cold. The difference in energy (called W) can be used to drive a mechanical motor. That might explain why motors and people overheat when they work too hard.

#### Announcements

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
* To read other works by this author visit http://www.thenatureofthings.info/index.html

## CONTENTS

* Click for link to Physics for beginners as a single pdf file
# Physics for beginners/07-waves
#### Announcements

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
* To read other works by this author visit http://www.thenatureofthings.info/index.html

## CONTENTS

* Click for link to Physics for beginners as a single pdf file
# Physics for beginners

... by Matthew Raspanti

#### Images

* Lens and wavefronts.gif
* Partial transmittance.gif
* Snells law wavefronts.gif
* Two sources interference.gif
* Wave equation 1D fixed endpoints.gif
* Exp series.gif
* Atomic-orbital-clouds spd m0.png
* Bohr atom model English.svg
* Hydrogen Density Plots.png
* AirShower.svg
* Aurore australe - Aurora australis.jpg
* Alfa beta gamma radiation penetration.svg
* Rays_of_light_through_a_different_medium_(labelled).svg
* Coupled oscillators.gif
* Mode Shape of a Tuning Fork at Eigenfrequency 440.09 Hz.gif
* Simple harmonic motion animation 1.gif
* Heisenberg microscope with wavefronts and electron scatter.svg
* Wave-particle duality.gif
* Circlestrafing animation.gif
* Rolling Racers - Moment of inertia.gif
* Model of the initiation of termination of a Rayleigh-Taylor instability in 2D.gif
* Karman Vortex street ani.gif
* Mars Loop.gif
* Zirkumpolar ani.gif
* Tuned circuit animation 3 400ms.gif
* Dipole.gif
* Brachistochrone.gif
* Halley's Comet animation.gif
* Galilean moon Laplace resonance animation 2.gif
* Surface chemical diffusion.gif
* InfiniteSquareWellAnimation.gif
* Karman trefftz.gif
* Propagation du tsunami en profondeur variable.gif
* Propagation du tsunami en profondeur variable.gif
* Vortex-street-animation.gif
* Maxwell's demon.svg
* Ergodic hypothesis w reflecting rays.jpg
* Proving Carnot Theorem.svg
* Fizeau experiment schematic.svg
* Stellar aberration illustration.svg
* Entropy flip 2 coins.jpg
* Earth-moon-field.svg
* Van de graaf generator.svg
* WestinghouseAtomSmasher.jpg
* Electric Bell animation.gif
* Faraday cage.gif
* Leaderlightnig.gif
* wikibooks: Electronics/Photocopier
* File:Simple harmonic motion animation 2.gif
    List of subpages
# Physics for beginners/00-preface

This page from the Vilna Edition Shas of the Talmud serves to illustrate how we can construct an interesting physics textbook. Raspani's "Physics for beginners" is the oldest and most central text, as is the Mishnah. Our job is to collectivley to create the Gemara, Rashi and other commentaries.
You can begin a new commentary ALMOST RIGHT NOW: Physics for beginners/Journal is a blank commentary, almost ready for a new author.

#### Announcements

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
* To read other works by this author visit http://www.thenatureofthings.info/index.html

## CONTENTS

* Click for link to Physics for beginners as a single pdf file
# Physics for beginners/05-atoms and molecules

* This is perhaps the simplest of many possible representations of an atom. Lithium always has three protons in the nucleus, and most lithium has four neutrons. Neutral (unionized) lithium has three electrons.
* Physics often uses contradictory or even mutually exclusive models. Here the two electrons of a helium atom are shown as what might be called an "electron probability cloud. The red spot in the center does not represent the nucleus becuse it would not be visible in this figure: It is about $10^{6}$ (or a million) times smaller than the the atom's electron cloud.
* A representation of the water molecule, with one oxygen atom attached to two hydrogen atoms. Note how the oxygen atom "steals" a small portion of the electron cloud from the two hydrogen atoms. This renders the the hydrogen parts slightly positive and the oxygen portion slightly negative in charge.

#### Announcements

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
* To read other works by this author visit http://www.thenatureofthings.info/index.html

## CONTENTS

* Click for link to Physics for beginners as a single pdf file
# Physics equations/sandboxes

To do for Spring 2014:

### Syllabus

* Exams count for 90% of the course grade.
** How tests are weighted: There will be 5 tests plus a final exam. Although there is only one final, it will be calculated as three tests with equal scores. Of these 8 tests, the worst two will be dropped. This way the final exam carries the weight of 1, 2, or 3 tests. And you get to drop 0 1 or 2 tests (depending on how well you do on the final). There are no makup exams.
** Rules: All tests are closed book. You will be given an equation sheet that, but you may not write upon it. You may use a calculator, but programs and access to the internet are strictly forbidden.
# Physics for beginners/06-particles in motion
#### Announcements

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
* To read other works by this author visit http://www.thenatureofthings.info/index.html

## CONTENTS

* Click for link to Physics for beginners as a single pdf file
# Physics for beginners/02-heavenly motions

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
# Physics for beginners/03-laws of motion
#### Announcements

Each subpage is devoted to a chapter of Matthew Raspanti's original work. Click the image of the pdf file shown to the right to read the chapter.
* To read other works by this author visit http://www.thenatureofthings.info/index.html

## CONTENTS

* Click for link to Physics for beginners as a single pdf file
# Programming Fundamentals/Introduction/Block
## Try It

Go to Blockly Demo or use your own Block compiler / interpreter / IDE.
* Blockly
* Gameblox
* Micro:bit
* Scratch
* Snap
* Tynker

## See Also

* Blockly
# Programming Fundamentals/Introduction/C++
## Try It

Copy and paste the code above into one of the following free online development environments or use your own C++ compiler / interpreter / IDE.
* CodeChef
* GDB Online
* Ideone
* paiza.IO
* PythonTutor
* repl.it
* TutorialsPoint

## See Also

* C++
* Wikibooks: C++ Programming
* cplusplus: Structure of a program
# Programming Fundamentals/Introduction/C
## Try It

Copy and paste the code above into one of the following free online development environments or use your own C compiler / interpreter / IDE.
* CodeChef
* GDB Online
* Ideone
* InterviewBit
* paiza.IO
* PythonTutor
* repl.it
* TutorialsPoint

## See Also

* Wikipedia: "Hello, World!" program
# Programming Fundamentals/Introduction/COBOL
## Try It

Copy and paste the code above into one of the following free online development environments or use your own COBOL compiler / interpreter / IDE.
* JDoodle
* paiza.IO
* TutorialsPoint

## See Also

* TutorialsPoint: COBOL
* GnuCOBOL Manual
# Programming Fundamentals/Introduction/C Sharp
## Try It

Copy and paste the code above into one of the following free online development environments or use your own C Sharp compiler / interpreter / IDE.
* CodeChef
* C# Pad
* .NET Fiddle
* Ideone
* paiza.IO
* Rextester
* repl.it
* TutorialsPoint

## See Also

* Microsoft: Hello World Tutorial (C#)
# LaTeX/helloworld.tex

The barebone document
The barebone document using W:amstex
# La Gerda-kurso

This is a more advanced course and is taught entirely in Esperanto. If you are interested in a more basic course you may want to take Introductory Esperanto first.

### Texts

* Esperanto Wikibook
* Esperanto Wiktionary
* Esperanto Online Chat!

### Lessons

* Before you begin, sign up with a tutor.
* Lesson 1:
* Lesson 2:
* Lesson 3:
* Lesson 4:
* Lesson 5:
* Lesson 6:
* Lesson 7:
* Lesson 8:
* Lesson 9:
* Lesson 10:
* Lesson 11:
* Lesson 12:
* Lesson 13:
* Lesson 14:
* Lesson 15:
* Lesson 16:
* Lesson 17:
* Lesson 18:
* Lesson 19:
* Lesson 20:
* Lesson 21:
* Lesson 22:
* Lesson 23:
* Lesson 24:
* Lesson 25:

#### Readings

* Word List for La Gerda-Kurso
* Vocabulary, Affixes and Correlatives
* Esperanto
* Wikipedia en Esperanto
# LaTeX/Two-lined-subscripts

If you want to write a large sum like$\sum _{i<j;m\in \mathbf {Z} ;d\in {\mathcal {N}}}$ you may want to break the summand into two lines. The problem with \\ or \newline is that they work only in the paragraph mode.
In latex, we can do that by
Or, to do this in-line instead of displayed,
Here is another solution.
# Labelling technique

This psychology resource is a "stub". Learn how you can help Wikiversity to develop it.
# Learning from conflict and incivility/Instances of incivility

This page is envisaged as a common workspace for the Learning from conflict and incivility project, to identify instances of incivility. However, this activity is not unproblematic - there is probably a range of opinions about any action, and whether or not it is uncivil. Therefore, it could be a start to identify what different people consider to be "uncivil". It might therefore be an idea to have each instance as an initial example "brought to the table" by an individual, which can then be discussed generally. Discussion might well become heated - but, again, it is encouraged to keep within the ground rules of the project.