Prelude... again
No one denies that thoughts, ideas, are in some way "inside" of man. In fact, we here fully affirm that they are totally inside the man, in every essential respect. When Platonists prescribe the forms "ideas" existing apart in their own separate, higher reality, we see the burden of proof on them. Semi-syllogistically, this would run in the following manner. Thoughts are in man. Man knows his thoughts. To say that his thoughts come from higher requires an addition positing of some third thing, in addition to the two: man and the thought. Occam's razor neatly slices away the other. . .
Why is it necessary that the world be intelligible at all? Intelligibility requires that there be some sense in which the world is in the mind. In fact, it requires either a god to know the world, and our participation in that - the semi-Platonic view, or that the world is in some sense a representation of that inside of man - an un-rigorous Sartrean view. Or perhaps some third intermediary view - like that of Aristotle. There is some "faculty" in us that apprehends the "intelligible form" directly. So that man in his whatness sees the natural stuffocity of the thinghood in question. Jargon? Perhaps. A description of the world? Less likely.
Shouldn't we rather assert that the universe is unintelligible? But there is some "faculty" in man - call it the untruthful faculty - that smears nature into these categories of thought for the sake of recognizing dissimilar situations as the same - for the sake of living. But then wouldn't all recognition of similitude be an analogous smearing of nature? We see the fundamental questionableness of nature. But nature is dumb. She never answers our calls...