(noun) A slang word that is used when talking about an issue, problem, or dilemma, but don't want to use a word as harsh. The meaning is similar, but the connotation is lighter.
This word is similar to "dilemma", but is not derived from that word.
Ron: "I have an issue."
Sam: "Do you know the solution?"
Ron: "Yes."
Sam: "So... what's the lemma?"
Part of a mathematical proof that draws too much attention so readers have much more difficulty in understanding the whole thing than before.
Teacher: "We shall use Itô's lemma to study stochastic calculus...Oh! Sorry, should be the other way around!"
As AI improves, fewer people will be able to demonstrate by virtue of their intelligence that they are not computers.
As AI becomes better at diagnosing than doctors, Turing's Lemma applies. Customer service is a profession in which Turing's Lemma does not yet apply, unfortunately.