>>16729467Classical computers and Quantum computers can compute the same things. Quantum computers are just simply faster at solving certain classes of problems, such as integer factorization.
>>16729549He (implicitly) argues that "If I have a quantum computer, then I will get a correct answer", which I guess is valid. He then goes on to argue "If I don't have a quantum computer, then I will not get a correct answer", which is fallacious. By "antecedent" I did not literally mean the previous statement in the image in OP.