@freemo
Actually, there are 8 holes. Let's count them:
- If you can see through the shirt that means you have 2 holes in the front and 2 holes in the back - subtotal 4
- then you have 2 more holes for the arms, 1 big hole down where you put your head to pull the shirt on you and a smaller hole up that allows you to take your head out (and make those complicated topological calculations) - subtotal 4
Total = 8
@mc
Yes thr definition you choose is a bit open. Thankfully the two mathematical definitions of holes would five you the same answer here.