[E. Pluribus Unum]

Unimpeachable certainty does not mean that silly arguments or bogus data provide acceptable impeachment.

How can you possibly know that evidence is unimpeachable when the people handling it are extremely impeachable?

[xzins]

Because multiple eyewitnesses, confession, etc. combined with physical evidence sometimes provide unimpeachable certainty.

If you and your neighbor watched me take your car from the driveway and you both knew me, and I never return your car, would you have some idea of whom has stolen your car?

Would you be absolutely certain given the above facts?