One of my professors (a jolly fellow) joked about us having "street cred" based on our past work. So if we've been reliably good at proofs, when another proof h

One of my professors (a jolly fellow) joked about us having "street cred" based on our past work. So if we've been reliably good at proofs, when another proof had gaps, he said he'd assume we knew but just went too quickly, but someone with lower "street cred" would just get marks off ;)