Bailey's Priority Principle

Andrew Bailey formulated and defended the Priority Principle (PP), that we think our thoughts in a primary rather than inherited way. His main argument for PP is a two-thinkers argument: if I think my thoughts in an inherited way, then something else—the thing I inherit the thoughts from—thinks them as well, but there aren’t two thinkers of my thoughts. While this argument is plausible, I think it skirts around the main intuition behind the PP. That intuition is that there is something implausible about us being thinkers in a derivative way. This intuition, however, is quite compatible with there being something that derives its thoughts from us, but not so Bailey’s argument, which (unless I am missing something) equally rules out the hypothesis that we inherit our thoughts and the hypothesis that our thoughts are inherited by something else.

Is there a way to argue for PP in concert with this intuition, namely to argue that whether or not there are two thinkers of my thoughts, I am their primary thinker? Such an argument would also escape the following apparent counterexample. Social organizations can have thoughts, derivative in a complex way from their members’ thoughts. But now suppose I join a club, and everyone else resigns membership. Then the club’s opinion on matters relavant to the club’s subject matter comes to be inherited from me. So now there are two thinkers, the club and me, though I am the primary one. This case (which to be fair I am not completely sure of) is a counterexample to Bailey’s argument but not to its conclusion.

My students came up with two closely related arguments, which we might put something like this. First, among our thoughts are intentions. If these are derivative, we are puppets of the primary intender, contrary to our freedom. Second, some of our thoughts are deliberate. It is a contradiction in terms that we think deliberately and yet our deliberate thought is inherited from a prior deliberate thinker—puppetry is incompatible with deliberativeness.

These arguments do not directly show that we are always primary thinkers, so they immediately imply only a weaker version of the PP (WPP), namely that sometimes we think non-derivatively. WPP is still interesting. For instance, it rules out standard perdurantist theories on which we inherit all our thoughts from our temporal parts. Furthermore, WPP makes PP moderately likely: for it is plausible that if there is any thought-inheritance it always goes in the same direction.

That said, maybe there is some reason to accept WPP without PP. Here is one kind of case. Possessing a concept is, perhaps, a way of thinking. But given some moderate semantic externalism, sometimes we possess a concept—say, of a quark—by inheriting it from an expert. Or suppose that the extended mind thesis is true, so that we count as knowing some things because they recorded on our devices. Maybe electronic devices don’t have knowledge, so this isn’t exactly knowledge inheritance. But imagine that you train a parrot to remember all your credit card numbers (a foolish idea) and you carry the parrot with you always. Now you inherit the knowledge of the numbers (under some description common between you and the parrot, definitely not “credit card number”) from the parrot. I am dubious of the extended mind thesis, but there is no need to stick one’s neck out. WPP does justice to many of our intuitions.