What does Magritte mean when he says "This is not a pipe"? It sure looks like a pipe. But step back for a moment: what is the definition of the thing you are looking at? The thing you are looking at is not a pipe. The thing you are looking at is a picture. ... You see, if it were actually a pipe, you could stuff tobacco in it, smoke it, etc. But you cannot do anything like that with it. This is not a pipe. It's a picture.
We generally figure this out when we're growing up. You have a Teddy Bear. When you're a child, perhaps you very adorably treat Rupert as if he were "Bear: Subtype Stuffed". But that isn't really true! Rupert is not any kind of a bear at all, and has no actual connection to Ursus. In reality, the amusing childhood mistake is an inversion of the true state of affairs... Rupert is really a "Stuffed Toy: Subtype Bear".
Likewise, Magritte's treacherous pipe is not a "Pipe: Subtype Picture". Rather, it is a "Picture: Subtype Pipe".
Here's another fine example: consider trips to Rome. You can have an expensive trip to Rome, a long trip to Rome, a pious trip to Rome, etc. Some trips to Rome can be several of these at once. There are all sorts of trips to Rome: religious trips, business trips, sightseeing trips, etc. But what about "imaginary" trips to Rome. You don't need a passport for those, do you? That's because an imaginary trip to Rome is not a kind of a trip to Rome! It's a kind of flight of fancy, one about Rome as opposed to being about something else.
has no actual connection to Ursus
“It was designed to look like one” does sound like a connection to me.
Here's the new thread for posting quotes, with the usual rules: