That's a pretty deep reply. Thanks for the comments. Only one point--I really liked my math teachers and I'm glad they were taught us ingrates *bg*. OTOH, I really "see" your desire for visibility (If you'll forgive the horrible pun). BTW, my equivelent expression for "selling fog" is "vaporware." If I understand correctly :-))

As for what feeds intuition...I dunno. Do you suppose there's a gene for hunches?

>One thing which took me away from high-school math lecturing and nailed me to ...snip
>This direct visibility of criteria is a probable cause of that neutrality you mention - you can't "sell fog" (local slang, but meaning should be obvious) for