[emp17344]

There are humans who can’t read. That doesn’t mean Grammarly is “intelligent”. These things are tools - nothing more, nothing less.

[jychang]

There's no structural difference in the brain between those who can read/write vs those who can't. It's not a distinction.

Would you consider Socrates not intelligent since he was illiterate and had contempt for the written word?

If you want to classify intelligence, you need to define it properly.