Neil: That's a good point, but allow me to present a competing idea: 1. Imagine a situation where the brain's concentration required that other systems be "shut down" or put on automatic pilot. Vision therapy patients often do things like clutch their fist or make funny faces when trying to teach their brain (visual system) to see differently. It's common for anyone to concentrate intently on something to have some other feature of the anatomy go on automatic pilot. So I think it is possible that your student may have done what the brain does with eyes during sleep because, well, that aspect of cognitive functioning was being diverted to strenuous contemplation -- and because sighted individuals had learned to control both at the same time. It's not that there isn't enough capacity to do both; it is that the person hasn't learned to coordinate it. It would be the same as people who can chew gum and rub their stomach at the same time versus people who have to practice at this. presumably, this student was not as practiced in controlling sight while thinking because controlling sight was not habituated in life. Also, think of sighted people who, when trying to remember, look up in the upper (left or right) corner of their eyes. When you think about it, eye diversion happens to some degree in sighted people too. We wouldn't want to say that the eye movement was evidence of "the looking of ideas." It was, rather, the same sort of thing that happens when people have trouble walking a straight line or writing while on the phone. 2. It indeed is Wittgensteinian to say that thinking/languaging is a "behavior." But, paradoxically, it may not be "behaviorist." That depends upon what is being said. For my money, language as a behavior is a different sort of thing -- it's cognitive behavior as opposed to bodily (ordinary) behavior. The difference is that one is rather cold and inanimate ("the behavior of organs") while the other is more of a choice ("do the respondents choose Dentine or some other brand). In short, one is a family resemblance. Regards and thanks. Dr. Sean Wilson, Esq. Assistant Professor Wright State University Redesigned Website: http://seanwilson.org SSRN papers: http://ssrn.com/author=596860 Twitter: http://twitter.com/seanwilsonorg Facebook: http://www.facebook.com/seanwilsonorg New Discussion Group: http://seanwilson.org/wittgenstein.discussion.html WEB VIEW: http://tinyurl.com/ku7ga4 TODAY: http://alturl.com/whcf 3 DAYS: http://alturl.com/d9vz 1 WEEK: http://alturl.com/yeza GOOGLE: http://groups.google.com/group/Wittrs YAHOO: http://groups.yahoo.com/group/Wittrs/ FREELIST: //www.freelists.org/archive/wittrs/09-2009