Certainly, but my point is not everything is verifiable and we still have to act on the limited information given to us sometimes. If we have to say we don't know unless we've 100% verified something we would never get anywhere with anything. We make our best guess with the information and hope it is as close to the truth as we can get. If we've done our due diligence then it is more likely we are correct.

I'm in the camp that it is pretty much impossible to know the truth about most things. Even our eyes can deceive us, as the light reflected off the objects we see is a tiny fraction of a second out of date once it reaches us. How do I know the object hasn't been obliterated by a nuclear explosion at the very moment I'm looking at it? There's certainly a non-zero chance of that happening, so I can be sure it's truly there when I look at it.