[kahljorn]

you can't use occam's razor to "win" arguments and you can't use the impossibility of knowing for sure whether or not there is actually a unicorn or not in your yard short of showing up there and looking which you could always claim its out frolicking or whatever unicorns do to support the notion that there is or is not a unicorn in your yard and then transfer the impossibility of knowing that into a claim about whether or not aliens built the pyramids.