If you’re coming from a point of ancient logic, then you’re talking about more than just pure logic. The ancients tied up language, rhetoric, and logic all up into their conceptions. An Enthymeme is an ‘imperfect syllogism’ because it is used in rhetoric where premises are unstated. That’s how we use the term today, when we are laying out an argument (usually not in bullet-point form) and someone finds we’re missing premises in our description. It’s not a catch-all term for imperfect logical forms. The catch-all term for imperfect logic is “formal logical fallacy”
Einstein relying on non-Euclidean geometry isn’t a contradiction or illogical. Spacetime IS curved and therefore modeled more properly with non-Euclidean geometry. Illogical doesn’t mean “confusing” or “not easily understood”. Einstein has been vindicated and his reasoning (mostly) confirmed for over a hundred years once our scientific knowledge caught up. In otherwords, Einstein wasn’t arguing with false premises. He was arguing with premises that were true, but not well known to be true.
A thing cannot be, and not be. Religious thinkers understand that, this is why theologians say that God can’t do something against his nature. Because they understand that contradictions are a problem. Your argument as it is formulated is contradictory. The logic doesn’t follow, it is fallacious.