TASK DEFINITION: Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.
PROBLEM: I've been reading Michael Innes books again (in this case 'From London Far'), and I came across the word gratricidal, in the a passage about a Scottish castle... Castle Moila was famous alike in legend, history, and fiction. To these courts Magnus Barelegs has brought fire; Donald, Lord of the Isles, a traitor's promise; Macleod of Lewis a gratricidal knife. Here had come Prince Charles Edward, thwarted of a throne, and daughters of a hereditary captain had offered him manchets and wine. So what is gratricide? Attempts to find this online are stymied by the spelling being corrected to fratricide.

SOLUTION: Magnus Barelegs, named in the question, was Magnus Olafsen who ruled in the 11th century. Therefore the 'MacLeod of Lewis' mentioned must be contemporary, or perhaps somewhat later. The Lewis branch of the clan MacLeod, descended from Leod, a son of Olaf the Black, was a notoriously bloodthirsty family, particularly among themselves : The traditional progenitor of the Macleods was Leod, whom tradition made a son of Olaf the Black, King of Mann and the Isles. Tradition gave Leod two sons, Tormod - progenitor of the Macleods of Harris and Dunvegan (Siol Tormoid); and Torquil - progenitor of the Macleods of Lewis (Siol Torcaill). In the 16th and early seventeenth centuries the chiefly line of the Clan Macleod of The Lewes was extinguished due to family infighting. This feuding directly led to the fall of the clan, and loss of its lands to the Clan Mackenzie. The modern line of chiefs of Clan Macleod of The Lewes are represented by the leading family of a cadet branch of the clan - the Macleods of Raasay. ScotWeb Thus the reference is almost certainly a misprint for 'fratricide'. Note : As one of the Johnstones of Annan (Numquam non Paratus - 'never unprepared') whose ancestors were prone to sneak over the border and raid the English, one can make no criticism of other Scottish clans.

PROBLEM: Suppose I tell something to my companion and I want to make sure he understands me. I thought I may simply ask 'Do you understand me?'. But recently I heard that in such cases I should ask 'Does that make sense?' instead. Is this true? Which option is appropriate to use in business communication?.

SOLUTION: 'Do you understand me?' slightly carries the implication that it is your fault if you do not understand. 'Does it make sense?' carries the implication that it is my fault if you do not understand. So politeness suggests that the latter is better.

PROBLEM: What is the mark of punctuation called that sometimes separates sections of a chapter with a glyph placed in the middle between the margins? It's hard to explain, but here's a picture. Does this have a name? (Yes, I know this is a asterisk. Sometimes it's three of them, sometimes it's a stylized graphic. I'm looking for the general name of the...methodology/practice (?) of doing this.).

SOLUTION:
As explained by this page on Wikipedia, it's called a section break. I point you to the text of the annotation on the right side of the page where it pairs this term with the same kind of glyph you posted: Open pages of the book Alice's Adventures in Wonderland, showing an ornate section break on the lower left page created from asterisks. It is used to signal a pause for the reader and a transition in the narrative. And also the section on flourished section breaks: Space between paragraphs in a section break is sometimes accompanied by an asterism (either proper or manual * * *), a horizontal rule, fleurons, or other ornamental symbols. An ornamental symbol used as section break does not have a generally accepted name. Such a typographic device can be specifically referred to as dinkus, space break symbol, paragraph separator, paragraph divider, horizontal divider, thought break, or as an instance of filigree or flourish. Ornamental section breaks can be created using glyphs, rows of lozenges, dingbats, or other miscellaneous symbols. Fonts such as Webdings and Wingdings include many such glyphs. In HTML, horizontal rules can be generated using the hr tag, which generates a paragraph-level thematic break. For more ornate presentation, CSS can be used to replace the line with an image. As you've rightly acknowledged, the form a section break takes is entirely up to the person creating the publication.