OPINIONS are quarks+leptons the smallest

whats youe OPINION are quarks+leptons the smallest particals?

i that knowone knows for sure but do you THINK they are the smallest particals (without going into strings)??

i think yes because they are so much smaller than hadrons that are only made from 2/3 quarks.

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:(
i never actually read about this or heard about this in school, so it's all my own guessing.

But has it really been proven that my theory is either false or true?