Any time I asked this question it produces some joyful brainstorming. It doesn't matter if it is a room full of highly technical people(engineers, mathematicians) or a family dinner.
I've already heard most of the arguments from the topological definition of a hole to difference between a hole, a cavity and a hallow but it is still very fun for me to watch people getting excited over such a boring looking question. (:
Any time I asked this question it produces some joyful brainstorming. It doesn't matter if it is a room full of highly technical people(engineers, mathematicians) or a family dinner.
I've already heard most of the arguments from the topological definition of a hole to difference between a hole, a cavity and a hallow but it is still very fun for me to watch people getting excited over such a boring looking question. (: