As I’ve described more than a few times, one of the big problems that modern atheists have is that they are hyper-reductionists. They will not admit that composite entities are real. If a human body is made of atoms, they will not admit that a human being is anything more than atoms. They will of course use the word “human being” in the same way that normal people do, but they will balk at any implication of the word which they don’t like. Consistency is not their strong point.
And indeed consistency is so little their strong point that they are never hyper-reductionists elsewhere. I once joked about proposing alinguism (that language doesn’t exist, only words do). It would be even more fun, I think, to troll atheists with the proposal that Science doesn’t exist. Scientists do, of course, but not science. One could go all the way, asking where it is, how much it weighs, etc. I think the most fun would be to ask for a peer-reviewed scientific paper which describes the repeatable experiment that shows that science exists.
There isn’t really a point in this, because (in my experience) atheists never recognize their reasoning applied to anything but what they apply it to. I am coming to believe that the reason for this is that their reasoning is not in fact an attempt to understand the world. If it were, they would be interested in trying to apply it to the world. Instead, it’s mostly an attempt to get out of applying their putative beliefs to the world. That’s because their beliefs are primarily cultural. Belief is part of what unites people, and most atheists’ beliefs are held in that way—as a form of tribal identification. You can see some people hold beliefs about the best football team in a similar sort of way. It’s not that they’ve really analyzed all of the football teams in the league(s?), but that loudly espousing one team as being the best has a unitive function amongst fans. You see a similar sort of thing in religious observance, where many people like the community more than they care about the actual religion. In a possibly ironic way, this applies as much to irreligion as to religion.
And in consequence, much of what the irreligious say is not an attempt to think, but an attempt to avoid thinking. Like with those who are religious for purely social reasons, it’s not an admirable thing for a human being to do.