On-Topic: STEM. Humanities. Humor. Anything intellectually engaging and pro-social.

Off-Topic: That which is flame bait or vacuous.

In Submissions

If you submit a link to a video or pdf, please warn readers by appending [video] or [pdf] to the title.

Please submit the original source.

In Comments

Be civil. On difficult subjects in particular, you should work hard at being diplomatic. (It helps to picture yourself speaking to a friend.)

When disagreeing, reply to the argument instead of calling names. "That is idiotic; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."

Assume good faith.

Eschew flamebait.

Please limit your use of uppercase; it looks like shouting and is hard to read.