Paul Crowley

Yes, this is what I was going to say. They can both be partially right if JFK was shot by Oswald, but not from the book depository, but they can't both be completely right as their accounts are contradictory.

I'm also interested that for Alice's account ciphergoth uses the word 'believes', which implies that she doesn't have any evidence, whereas he ascribes 'knowledge' to Bert - indicating that he perhaps has some additional information such as a watertight alibi for Oswald.