ABSTRACT Ordinary thinkers are not only capable of keeping hold of the same thought across contexts via shifts in the way of thinking. They also possess the ability to do so in a manner that grounds disagreement with respect to other thoughts. In this paper, I elucidate the ensuing phenomenon of dynamic disagreement and introduce the type of account most likely to accommodate its distinctive features. I argue, in particular, that dynamic disagreement requires the postulation of dynamic concepts or concepts (...) that display a number of ways of thinking in different contexts. Finally, I suggest that alternative approaches to dynamic thought face difficulty in fully capturing the phenomenon. (shrink)