answer if the puzzle assumes that every opening passes through both the front and back of the shirt and counts each entrance and exit separately.
The important thing is that the picture doesn’t explicitly tell us to use that unusual counting rule.
So if someone answers 6, they aren’t missing the trick. They’re simply using the ordinary meaning of “holes.”
Why This Puzzle Is So Good at Fooling People
The real challenge isn’t counting.
It’s figuring out what you’re supposed to count.
That’s a classic feature of visual brain teasers.