This is a trivial problem in grammar with the terms truth and proof and can be debunked pretty easily.

a) how can you testify that a teapot orbits the sun?

This is a very different question than Russell is asking and is the entire reason why philosophy and theology became closely related after because of augustine.

We demand warranty of goods and services, but we have stopped demanding warranty of information (words).

So the question is, how can one warranty his statement that a teapot orbits the sun?

Then why does he say such a thing? In other words, just as in any other crime, what is one’s incentive?