Here is the scenario. You are presented with 10 little boxes labelled one to ten.
If you open them in sequence (1-10) then you fill find an unexpected egg.
Before you start opening the boxes, consider this.
It cannot be in box 10. By then you will have opened the other 9 so it can only be in box 10.
That means it cannot be in box 9 either.If we open boxes 1-8 and find
no egg then it must be in box 9 as we have eliminated box 10.
Boxes 8, 7, 6…. all fall to the same logic. Even box 1 is eliminated.
You are paradoxed and think “to hell with it!” and start opening the boxes one by one.
In (say) box 3 is an egg.
You weren’t expecting that!