“Yet it depends on yours. The two are one.
They are a plural, a right and left, a pair,
Two parallels that meet if only in”

“In s (in which 180° = \pi [radians]). Further, each full line (great circle) is of finite length 2 \pi R, and any two full lines meet in two points—there are no parallels!”

“Two wrongs don't make a right, but don't three lefts make a right? Two wrongs don't make a right, but don't two negatives make a positive?”

“I can still feel you, Eva. Still taste you. I’ve been
hard since you left, through two meetings and one
teleconference. You’ve got the advantage, state
your demands.”

“Modern 3D cinema technology works by ensuring your left eye sees one image while your right sees another. But they could, presumably, issue one pair of specs comprising two left-eye lenses (for children to wear), and another with two right-eye lenses (for adults). This would make it possible for parents to take their offspring to the cinema and watch two entirely different films at the same time. So while the kiddywinks are being placated by an animated CGI doodle about rabbits entering the Winter Olympics or something, their parents will be bearing witness to some apocalyptically degrading pornography. The tricky thing would be making the soundtracks match. Those cartoon rabbits would have to spend a lot of time slapping their bellies and moaning.”

“Two wrongs don’t make a right, but three lefts do.”

“One and one is two; two and two is four; and "five will get you ten" if you work it right!”

“Frege's pair of concepts (nominatum and sense) is compared with our pair (extension and intension). The two pairs coincide in ordinary (extensional) contexts, but not in oblique (nonextensional) contexts.”

“All you who sleep tonight
Far from the ones you love,
No hand to left or right,
An emptiness above--

Know that you aren't alone.
The whole world shares your tears,
Some for two nights or one,
And some for all your years.”

“The moon sets and the eastern sky lightens, the hem of night pulling away, taking stars with it one by one until only two are left.”