Not the only machines by a long shot. While it's certainly conceivable to think of memory and thought as one gigantic state machine, it's impractical to model

Not the only machines by a long shot. While it's certainly conceivable to think of memory and thought as one gigantic state machine, it's impractical to model it that way. What makes FSMs neat is that they are incredibly useful, in spite of having no memory and a relatively limited set of states.