I'm going to have to give you a duh on that!
When someone says something so basic it makes your head explode and you want to punch them.
'I didn’t do my homework because I was lazy', said by the person who never did homework in the first place.
'I failed the test because I was distracted', said by the kid who was texting during the whole thing.
'I got a bad grade because I didn’t know the answers', said by the person who didn’t even read the question.'