"In school, taking credit for someone else's work that you had nothing to do with creating is unethical, not accepted, and punished severely. In the work world, it's called Tuesday."

--Anyone who's experienced it

Cheating and collaboration are not the same. If you've ever taken an advanced math/cs/STEM class you've collaborated often on problem sets, they are often too hard to do alone. But you shouldn't have cheated.