Another thing you can do is combine tagis results and see what they add up to:
Code:
tagis[HasFeat.fWepFin] + tagis[HasFeat.fComExp] > 0
This works because tagis[whatever] returns 1 if the container in question (the hero, in this case) has at least one copy of the referenced tag. So in the above example, the result will be 1 if the hero has one feat, 2 if they have both, and 0 if they have neither. So any result greater than zero is valid.