zodium said:Unless you subscribe to dualism, in which case you may as well not argue anything because it's a baseless assumption, "thought" is simply your brain processing information received from your senses.
To elaborate, refer to Descartes' infamous "Cogito ergo sum" quote. You can know that you think (exist) simply by virtue of asking the question "Do I exist?", but you cannot know anything else since, conceivably, an evil deceiver could be sending false information to your senses.
It is in fact entirely possible not to subscribe to any manner of dualism while still holding that thought is not merely a 'brain process' (physical thing); the most popular theory of this type in modern/contemporary philosophy would be the Functionalist approach. There are others too, though obviously things start to get a little complex here (the nature of the mind-body/soul-body union/relationship is, and has always been, a huge discussion point in philosophy).
In regards to good old Descartes, his Cogito was designed to prove the existance of 'I', or the thinking mind we concieve of as the 'self'. The Cogito relies on no 'senses', and yet is the foundation of all knowledge in Descartes philosophy. That is to say, Descartes based his whole epistemological system upon this one initial truth, a truth he found through reason and entirely without external cause (ie something gained through the senses). Beyond this initial 'truth', Descartes is forced to rely on the existance of God to 'rebuild' his world of knowledge after his radical scepticism; and it is this rebuilding and its reliance upon the existance of God (and the arguments thereof) that have lead to his work being largely discredited. (Though his methodology and reasoning was, and remains, critical to modern thought: without Descartes, the world would be *very* different).
In responce to your use of the Cogito, it seems you're suggesting that because Descartes does not accept that the senses are a part of what makes up our thought ('in some way or another, without senses, no thought' - my understanding), he eventually finds himself stuck without being able to believe in anything, incase he may be deceived. Therefore, Descartes & the idea that thoughts or the mind can exist without sensory data at some stage being perceived is nonsense.
I would personally perscribe to the notion that without sensory perceptions the mind cannot exist. But for the sake of argument:
The Descartes comment only argues that if Dualism were true, we could be deceived about what we sense. Is it madness to believe we might be deceived? (modern refer: The Matrix! - But also consider less obvious 'deceit', ie deceit of the senses, etc.)
To take this idea further, consider Berkeley's philosophy, that, in efect, everything only exists as a thought or concept within the mind of God, and God causes what we see/understand as causation to occur. Or look to Hume, and consider how two pool balls transfer energy to each other when one rolls in to the other. What do we know of how the 'force' is transmitted in physics? Surprisingly little, we only know that it *is*; our understanding of *why* and *how* is limited to our subjectivity (within space/time and so on).
I should really be doing something else right now....
PS. Mage pets suck :censored: