Ask any SOTA AI this question: "Two fathers and two sons sum to how many people?" and then tell me if you still think they can replace anything at all.
What answer do you expect here? There's four people referenced in the sentence.
There's more implied because of Mothers, but if you're including transient dependencies, where do we stop?
It can also be 3 people, as one person can be a father and a son at the same time. If you allow non-mentioned people to be included in the attribute (i.e. the sons of the fathers are not part of the 2) it could also be 2 people, as long as they are fathers.
If you force it to use chain-of-thought: "Two fathers and two sons sum to how many people? Enumerate all the sets of solutions"
"Assuming the group consists only of “the two fathers and the two sons” (i.e., every person in the group is counted as a father and/or a son), the total number of distinct people can only be 3 or 4.
Reason: you are taking the union of a set of 2 fathers and a set of 2 sons. The union size is 2+2−overlap, so it is 4 if there’s no overlap and 3 if exactly one person is both a father and a son. (It cannot be 2 in any ordinary family tree.)"
Here it clearly states its assumption (finite set of people that excludes non-mentioned people, etc.)
Any number between 2 and 4 is valid, so it's a really poor test, the machine cna never be wrong. Heck, maybe even 1 if we're talking someone schizophrenic. I got to wonder which answer YOU wanted to hear. Are you Jekyl or Hide?