Understanding how plants live is always going to be a useful endeavour. But trying to judge whether a word like "intelligence" applies to them isn't really abou

Understanding how plants live is always going to be a useful endeavour. But trying to judge whether a word like "intelligence" applies to them isn't really about plants any more, but about how we should define the word. Many of the words that we use aren't strictly well-defined when you start thinking about them. "Vehicle" was one that was discussed a while ago, in the context of a sign banning vehicles in a park.