What a coincidence! ✬

I think it is a mere coincidence. ✬

We met completely by coincidence. ✬

I wonder if it really was a coincidence. ✬

Tom doesn't think this is a coincidence. ✬

It wasn't a coincidence. ✬

It was just a coincidence. ✬

It was no coincidence that both Tom and Mary were in the cafeteria at the same time. ✬

It's not a coincidence. ✬

This can't be a coincidence. ✬