Evaluate the similarity between them and classify them into classes from 0-5 as follows:
0 : The two sentences are completely dissimilar.
1 : The two sentences are not equivalent, but are on the same topic.
2 : The two sentences are not equivalent, but share some details.
3 : The two sentences are roughly equivalent, but some important information differs/missing.
4 : The two sentences are mostly equivalent, but some unimportant details differ.
5 : The two sentences are completely equivalent, as they mean the same thing.

[EX Q]: Sentence 1: It's so stupid that it just has to be true. Sentence 2: It's amusing to think it even might be true.
[EX A]: 3

[EX Q]: Sentence 1: If it wasn't a life, then it would not be able to be born. Sentence 2: If it wasn't alive, then it would miscarriage on it's own.
[EX A]: 3

[EX Q]: Sentence 1: A brown dog is running through green grass. Sentence 2: A brown dog is running though a river.
[EX A]:
2