[mook]

Outdated comments are great, because it means you probably have a bug right there. If the comment didn't get updated, the code change probably didn't look at all the context and missed things.

Pretty sure I'm guilty of that pretty often.

[irthomasthomas]

Looking at someone else's code, how would you know which was out of date, the code or the comment?

[mook]

Does it matter? If the comment doesn't match the code, there's a bug (in the comment or the code). Either way you need to spend time to understand the context and figure out the correct thing, not trusting either.

[mumblemumble]

Looking at the commit history is a great start. Especially if your team actually empowers people to reject code reviews when the commit messages are unclear or insufficiently detailed.

[Vegenoid]

git blame will show when lines in a file were last changed, and the commit that changed them