> "There is an inconvenience which attends all abstruse reasoning. that it > may silence, without convincing an antagonist, and requires the same > intense study to make us sensible of its force, that was at first > requisite for its invention." A Treatise of Human Nature, > Book III, Part I, Section I. Excellent quote! I'll have to keep that one around. Yes, I'd say you were quite correct. One thing to keep in mind, however, is that college students are a lot closer chronologically to matrix algrebra than us in the working class :) It would be great if SICP wound up as an open-source project - then we could submit patches! Jon