Question:  Cranium and Polarity are both what?

Context paragraphs:
Cell polarity: Cell polarity refers to some differences in the shape, structure, and function of cells.  Almost all cell types exhibit some sort of polarity, which enables them to carry out specialized functions.  Classical examples of polarized cells are described below, including epithelial cells with apical-basal polarity, neurons in which signals propagate in one direction from dendrites to axons, and migrating cells.

Polarity (The Wedding album): Polarity is the second release from American punk rock band, The Wedding.  "Polarity" was released on April 17, 2007.  The new album showed a drastic change, vocally and musically, from the band's debut album.  "Polarity" features guest appearances by Davy Baysinger from Bleach, duet vocals; Dan Spencer Supertones with a trumpet line; and Josh Robieson (Flatfoot 56), bagpipe riff.  This is the last album to include Lead Vocalist/Pianist Kevin Kiehn.

Cranium (board game): Cranium is a party game created by Whit Alexander and Richard Tait in 1998, after Richard spent a weekend playing games with another family and recognized the need for a game involving a variety of skills.  He left his job at Microsoft, convincing his friend and co-worker Whit Alexander to join him in the creation of "Cranium".  "Cranium", manufactured by Hasbro subsidiary Cranium, Inc., is billed as "The Game for Your Whole Brain".  Unlike many other party games, "Cranium" includes a wide variety of activities.  Giorgio Davanzo handles packaging and branding for the game, and the artwork is done by Gary Baseman, creator of the animated television series "Teacher's Pet".

Polarity chron: A polarity chron, or chron, is the time interval between polarity reversals of Earth's magnetic field.  It is a term used in stratigraphy (a branch of geology) to name the time interval represented by a magnetostratigraphic polarity unit.  It represents a certain time period in geologic history where the Earth's magnetic field was in a "normal" and "reversed" position.  Chrons are numbered in order starting from today and increasing in number into the past.  As well as a number, each chron is divided into two parts, labelled "n" and "r", thereby showing the position of the field's polarity.  A chron is the time equivalent to a chronozone or a polarity zone.

Polarity symbols: Many electrical devices use direct current (DC) power, often provided by an AC (alternating current) to DC adapter, also known as a "wall wart" or "power brick".  The adapter typically supplies power to the device through a thin electrical cord which terminates in a coaxial power connector often referred to as a "barrel plug" (so-named because of its cylindrical shape).  The polarity of the adapter cord and plug must match the polarity of the device, meaning that the positive contact of the plug must mate with the positive contact in the receptacle, and the negative plug contact must mate with the negative receptacle contact.  Since there is no standardization of these plugs, a polarity symbol is printed on the case indicating which type of plug is needed.

Polarity item: In linguistics, a polarity item is a lexical item that can appear only in environments associated with a particular grammatical polarity – affirmative or negative.  A polarity item that appears in affirmative (positive) contexts is called a positive polarity item (PPI), and one that appears in negative contexts is a negative polarity item (NPI).

Trilinear polarity: In geometry, trilinear polarity is a certain correspondence between the points in the plane of a triangle not lying on the sides of the triangle and lines in the plane of the triangle not passing through the vertices of the triangle.  "Although it is called a polarity, it is not really a polarity at all, for poles of concurrent lines are not collinear lines."  It was Poncelet (1788–1867), a French engineer and mathematician, who introduced the idea of the trilinear polar of a point in 1865.

Polarity (game): Polarity is a board game that requires strategic thinking and dexterity to control hovering magnetic discs.  "Polarity" was invented in 1985 by Canadian artist and designer Douglas Seaton.  It was first published in 1986.  The game has had a tumultuous past, with its rights changing hands several times over the past two decades.  The game has been published by Telemotion Technologies, Irwin Toy, briefly with Mattel and most recently by Temple Games.  The game ships in a canvas sleeve and include the magnets, the board, and a paper rulebook.  An unrelated game of the same name is published by a company called Mindwalk (Company).

Umpolung: Umpolung or polarity inversion in organic chemistry is the chemical modification of a functional group with the aim of the reversal of polarity of that group.  This modification allows secondary reactions of this functional group that would otherwise not be possible.  The concept was introduced by D. Seebach (hence the German word "umpolung" for reversed polarity) and E.J. Corey.  Polarity analysis during retrosynthetic analysis tells a chemist when umpolung tactics are required to synthesize a target molecule.

C-UWB: C-UWB is an acronym for continuous pulse ultra-wideband (UWB) technology.  C-UWB derives its bandwidth by virtue of the short time duration of the individual pulses.  Information can be imparted (modulated) on UWB signals (pulses) by encoding the polarity of the pulse, the amplitude of the pulse, or by using orthogonal pulse shape modulation.  Polarity modulation is analogous to BPSK in conventional RF technology.  In orthogonal wave shape modulation, two orthogonal UWB pulse shapes are employed.  These are further polarity modulated in a fashion analogous to QPSK in conventional radio technology.  Preferably, the modulating data bits are scrambled or "whitened" to randomize the occurrences of ones and zeros.  The pulses are sent contiguously as a continuous stream, hence the bit rate can equal the pulse rate.

Supporting paragraphs: Cranium (board game) Polarity (game)
Answer: game