It might if he were an anti-theist as opposed to an atheist, but only because being an anti is more a mindset than a religion.
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Being "anti", hmmm. There are so many things to not believe in...astrology, phrenology, alchemy, the Great Pumpkin, transubstantiation, The South Beach Diet, the Gazelle Exercise Machine, Ford F-150 pickup trucks, plastic slimmer pants, the Kitchen Magician...
Are people that do not believe in the Tooth Fairy or the Easter Bunny "anti" to you?
How about those few who refuse to recognize the existence of Underpants Gnomes?
We all have so many things we could believe in or disbelieve in. Surely someone who believes in everything is wrong about some of what he believes in. Since the possibilities of the Universe are such that everything we know could conceiveably be wrong, or at least mostly incomplete. It would seem that a total disbeliever might be more likely to be an accurate than the Total Believer.
Someone that never believes that the time is correct could be right all the time, provided they were not asked for their opinion just once per day.