I mean his train of thought deserves credit, just not for factoring in everything. A good Greek philosopher was like the Sherlock Holmes of their day; I recall reading Aristotle saw the Earth's shadow on the moon and how it curved and he was like "ah, so the Earth isn't flat, it's a ball" (though then he'd go on to say stuff like "other cultures are less prone to revolution, so they must be natural slave cultures", which would be more like Half-Life 3's hypothetical version of Sherlock Holmes).