What can science prove?

[Frank]

Absolutely nothing. Science probabilifies, not proves.

That's not an accurate statement. Every little thing we take for granted (from the computers we're typing on, to the particle board desks in our offices made out of sawdust held together by glue, to the plastic used to make our cups, our printers, monitors, window blinds, books and paper, etc. etc.) were all once scientific discoveries. Would we say chemists only approximately know how to make plastic, or do they simply know how to make plastic?

I don't want to start parsing words - but your statement is sounds like semantics. Sure, you can say certain elements of quantum mechanics or whatever is probablistic (and that's true), but that's only a tiny segment of science.