373 ;;Quote: need a theory how perceiving keeps an animal in contact with reality for the successful conduct of its actions

378 ;;Quote: if the environment is only known through brain states, how can it be known objectively and accurately?

378+;;Quote: Descartes' doctrine of Corporeal Ideas--all awareness's are awareness's of states of the body

380 ;;Quote: non-demonstrative inference confirms an hypothesis with evidence; what is the origin for the hypothesis used to infer a model of reality?

382 ;;Quote: humans walking forward will report the reverse if the world looks like it is going backwards

383 ;;Quote: the inverse rate of dialation of a bounded region specifies time of contact

383+;;Quote: there is information in the optical structure specific to expectations about the future; e.g., the time-to-contact variable

386 ;;Quote: the Gibsonian program seeks to uncover natural, lawful basis for distinguishing jumpable objects, step-down places, etc.; e.g., velocity ratio

386+;;Quote: the Cartesian program seeks to impose subjective, meaningful categories on an objective, meaningless surround

390 ;;Quote: an affordance is an invariant arrangement of surface/substance properties that permits a given animal a particular activity; e.g., falling, climbing

394 ;;Quote: a motor program is an a priori prescription giving preferred quantities, commands, and symbolic representations; the symbols constrain the irreversible, rate-dependent processes

390 ;;Quote: subjects can accurately predict climbability of stairs

391 ;;Quote: set-points and programs as cause of behavior are still the products of an intelligent act with foreknowledge of regularity

394 ;;Quote: set-points such as body temperature are the result of system performance instead of the cause

394 ;;Quote: a biological system can achieve a stable equilibrium without comparing actual with desired values; under circular causality finds intersection of two functions

397 ;;Quote: the Gibsonian program replaces a teleological description with a circular causality between action and its affects; e.g., optical flow

399 ;;Quote: commands indicate action to be performed; indicational information does not provide details; details by specificational information

399 ;;Quote: neither commands nor rules can determine action; both can be ignored or cause conflict; both must be understood; not basis for coordination

400 ;;Quote: specificational information is like a law; determinate, non-negotiable, harmonious, automatic; suitable foundation for coordination

400 ;;Quote: Complementarity Principle for living systems--nature uses dynamics to the fullest while symbols used sparingly for direction and simplification

400+;;Quote: work out the dynamic aspects of natural systems before introducing symbol strings to complete the explanation; avoids arbitrariness