LETTER : How do I know that Lewis Wolpert exists?

As an agnostic I am having trouble believing in Lewis Wolpert ("An idea that beggars belief", 25 August). Apparently "he" thinks the only real evidence is the publicly verifiable evidence of science. Where does that leave my mystical experiences? I don't claim to know what to infer from them but I also know that no scientist can verify or disprove them. But I have much more direct evidence for them than for the existence of "Lewis Wolpert", or even for the reality of black holes.

Peter Reid

Mallorca, Spain