Quote Originally Posted by Cyhort View Post
I don't believe this. Even if plants can feel they have no intelligence at all so they wouldn't tremble in fear or anything like that. Any actions that they do are solely instinctual and not based on any intelligent reasoning.
Just because we can't judge or measure their intelligence does not mean they don't have any. It is very possible they are as intelligent as us. After all, we can only measure our own intelligence, we cannot accurately measure the intelligence of anything else when all we use is the human brain as a model.

As far as we know, plankton are the most intelligent living thing on the planet.