Copernicus
Industrial Strength Linguist
OK, with your excellent graphics skills and my superb mastery of set theory, we may be able to do this one together. I'll describe it and you draw it. (Be careful. You will be graded on this.) You will need to draw three concentric circles. Label them thusly:YES!!! Please do. Here, I'll even help you out with the two sets as you've expressed them (label them as you wish):
  SET1) "I will concede that those atheists who think BoP is a weak argument strategy seem to be in the minority."Ah ha, your escape clause. How cute. Alas *sigh* I have no homework, so onward with your diagram. Here, I've even provided a two-set Venn outline for you (If you have three sets in mind I'm all the more intrigued). Just label the sets and explain the intersection (that's the overlapping area ).
2) "I think that the vast majority of posts have been from atheists, not theists."
1) Outermost circle: All posters (atheists + non-atheists).
2) First inner circle (not too much smaller): All atheist posters (a subset of all posters, but still the majority of posters).
3) Innermost (smallest circle): All atheist posters who think BoP is a weak argument strategy (a subset of all atheist posters).
Now, it may help to color or shade the circles differently so you can properly understand how the sets nest within each other. You do have to get the proportions right so that the outer layer may be rather thin, given that the majority of posts here have been by atheists--both those who do and do not agree with the OP.