|
|
|
|
|
|
by twiceaday
1031 days ago
|
|
|
Sounds weird when you ask the question that way, but if you ask "is there a non-black marble in the bag?" the answer is clearly no. So the question is more like: Should "all marbles in the bag are black" be exactly equal to "not(is there a non-black marble in the bag)". |
|
|