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This is written as if it was a proven fact.

But at this point, whether he agrees with it or not, it's proven legal fact.

It's a proven fact that a raincoat will hold its size.

This is a proven fact by everyone in the world.

Having this as a proven fact does not make everybody religious.

Almost all women like it better when the man takes over completely - it's a proven fact of female psychology.

It's a proven fact that if you take an umbrella, it won't rain.

It's a proven fact that people tend to follow a crowd.

A number of speakers have already pointed out how it is a proven fact that pesticides can cause cancer.

That is a proven fact and has been discussed for years in great detail.