There is nothing in the books that says that people without magic can’t understand it?
I think there was a plot point in 4 or 5 book where harry is on trial for using some spell to scare away dementors, and his neighboor testifies that he really did it and people don’t believe her cause she doesn’t have magic. But that’s only seeing magical creatures, what stops anyone from understanding it exactly? They do repeatable things that return repeatable results, pretty understandable.
The easiest explanation is that it’s magic and we’re all muggles and therefore incapable of understanding it.
Something, something, magi-chlorians
There is nothing in the books that says that people without magic can’t understand it? I think there was a plot point in 4 or 5 book where harry is on trial for using some spell to scare away dementors, and his neighboor testifies that he really did it and people don’t believe her cause she doesn’t have magic. But that’s only seeing magical creatures, what stops anyone from understanding it exactly? They do repeatable things that return repeatable results, pretty understandable.
the neighbor is a squib, not a muggle
What’s the difference? There is no half magical state, you either can do magic or can’t.