Listen to your jungler when...

...your lane opponent is 3/0 and two levels up on you and the jungler tells you not to fight them again and that they can't gank because it's suicide.

Applies mostly to top laners, since they're the most trigger-happy players who wanna 1v1 at a disadvantage.

Here's the relative equation:

3/0 > 0/3 + 0/0