>>12985127The probability space consists of tuples (x1, x2), where x1, x2 can be either m or f. The entire space looks like this:
mm
mf
fm
ff
Here the natural language fuzz comes in. By saying "at least one is male", you only eliminate ff. Which leaves a space of mm, mf, fm. By making it ordered in some way, such as saying "the first is male", you could also eliminate fm, leaving only mm and mf.
The main reason probability trips people up is that everybody's too lazy to convert their shitty natural language sentences into probability spaces. Once you do, most of these brain teasers and "paradoxes" become trivial.