he basic Atheistic assumption about reality is that you CAN trust your empirical senses as a measurement for reality. I find it ironic that the very title of his book assumes that people can in fact have a Delusion of reality based on their senses.
Atheism makes no assumptions about reality. Neither does science (which, in fact, has shown we cannot trust our senses quite often).
Truth manifests itself in absolute laws that are fixed [not capricious or random] 1+1 will always = 2; that law of logic is a reliable method of reasoning [There is no such thing as a married bachelor] etc.. I would be willing to go toe to toe on any Atheist on this board who insists on defending a universe without any absolutes.
You can know simultaneously know the absolute position and absolute speed of a particle.