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Hi, >there are similarities between some functions of the brain, or even >consciousness itself, and computer programs - your joking. consciousness itself stays a riddle for the scientific community. Chomsky (whose birthday is near) et al wrote about transform grammar that is level under our conscious mind, and - though it was never meant that way - people constructed computer simulations for that & used the knowledge in AI. similarities is a rubber term - as similar as i am to a red tin bus is the working of our brain to a computer program. as language is always context-concious, if not dependent on it - please read more uptodate scientific texts if you have problems with that statement. >What is the possibility that we use some context-free elements at some >occasions or levels of perception and cognition? zero, as our mind is also result of history & never context free. context free is interesting if you try to describe structures that only interact in itself and have a lot of different appliances, like general construction rules not dependent on certain materials. i only have used this to describe database elements... so: this is impossible, context-free and conscious can not be (as consciousness works out of its context and is nothing without), like me having no personality if i am the only human left... regards .g.a. P.S.: often statements and terms out of the scientific community sound nice. but you have to understand the concept fully as it is dangerous to use concepts just because they sound nice. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%