And you claim to be a physicist?
http://www3.canisius.edu/~moleski/proof/provenegs.htm#egprovneg
Yes I am and I'm not sure why you guys keep reminding me. If you are talking about proving trivial claims like there is no elephant in my pocket, then yes you can prove many non-sensical claims like that, but non-trivial claims can only be proven using a null hypothesis, which is not appropriate for proving claims such as Santa doesn't exist.
So how would I prove that the magic bullet was impossible? By showing you every possible combination/orientation of how it wasn't possible for me? Would that convince you? Get real. Sorry, in this case, you can't prove a negative because no one can disprove something by failing to prove it true. But you can prove that it was possible by doing the 2 laser experiment and shoving the results down my throat. So get on that.
The best evidence (not proof) that the MB was not possible is the fact that not a single LNer has demonstrated that it was possible when it is so easy to do so. Otherwise, where's the beef?
And yes, I do have an elephant in my pocket.