But the data shows those factors were not the sole reason for the differences.

That was my sole reason for agreeing to take on the job.

I wanted to do it and that was my sole reason!

All this was done to them for the sole reason that they were Jews.

That she belonged to him and was his sole reason for living.

That was the sole reason why the whole thing failed in the end.

They were the sole reason she'd been on the road the previous night.

Brown is in no way the sole reason for the lost season after such a promising start.

Transferred for the sole reason of meeting good looking guys.

In a matter of a few months, she had become his sole reason for existence.