Given a sentence, generate a new sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.

A coat of happiness does n't make us happier .
A lot of sleep doesn't make us happier.

Smoking cigarettes is a nasty Business .
Smoking cigarettes is a nasty habit.

You are doubtful to find a mouse in the kitchen .

You are likely to warrant a stint in the PR .