In my case this is not a mental illness but a scientific fact.

But does Christmas history have a basis in scientific fact?

I'm not sure if the census will ever catch up with that scientific fact.

All stories were to be based on scientific and historical facts as we knew them at that time.

That is a scientific fact, which some day will be common knowledge.

I just want to remind you of a scientific fact.

"Is that your opinion or a statement of scientific fact?"

I also want the different restrictions to be based on scientific facts.

The common position is not entirely based on scientific fact.

It is a scientific fact that most of our renewable energy technology does not work.