Consider this argument:
- There is a comprehensive plan for your life not of your making.
- The best hypothesis to explain (1) is that the plan is God's.
- So, probably, God exists.
But I think this is too quick. I think a lot of people may have an intuition of (1) that is not simply based on a belief in a Planner. That intuition may be basic or it may be inferred inductively from various events in the person's life having an apparent plot, and more than a plot, a plan made with the person in sight. I remember a student who professed to be an atheist telling me that she feels that her life has a plan, and that she doesn't know if she can fit this with her atheism. (I told her she needed to figure this out.) She may have been exceptional: many atheists probably do not have the intuition of (1). But at least in regard to her, the argument wouldn't have begged the question.
And even if the intuition of (1) were always based on theism, that would not make the argument question begging in every case. For one could use Dan Johnson's brilliant observation on the ontological argument here. Suppose someone is reasonably a theist (e.g., due to a sensus divinitatis), then reasonably infers (1), then for some unreasonable reason (say, the wrong kind of social pressures) becomes an atheist but still maintains the belief in (1). Her belief in (1) remains reasonable—it is her atheism that is unreasonable on this story. (I don't need any claim like that every atheist is unreasonable. But this one I am supposing to be.) Then she would be reasonable in inferring back to theism from (1).