In snooker, Alex has demonstrated that he's not world championship class, unable to even earn a spot on the main snooker circuit. England's Mark Gray, in contrast, is in the world's top 70 in snooker, so that is something to be taken seriously as evidence of all-around skill. Obviously, Mark is but a fraction the pool player. Chinese 8-ball runner up Mark Selby is a great snooker player, too. The two Mark's are stars in two different cuesports, but the same cannot logically be said of Alex.
This makes no sense. We are comparing Dennis and Alex. Alex's snooker may not be quite world class, but it but it would certainly appear to be better than Dennis'. Ergo, adding snooker to the mix favours Alex in the comparison.
Gideon