I first learned that when I met a man who did NOT think in images. I was to present his with a Pert Chart of his project...(10 ft of computer-drawn interlocked lines representing the various phases).
He said, "Never mind, I don't look at those"
I said, "But it's just sort of like a road map, and..."
He said,"I don't do road maps, either!"
I asked,"How do you get places?"
"I get a series of directions...'go south on Jones Road for 12 miles, turn left at the white fence, go 3.2 miles till there is a church...etc."

He really did not 'see' the connection between lines on a map and reality.

I know another guy who learns aurally... he has people tell him things, and remembers them very well.

The ways people process data varies in many more...even more complex...ways, which accounts for many of the differences of opinion in certain areas.