The Mind as a Searchlight

The Bucket Theory of Mind assets that our knowledge consists either of accumulated perceptions or assimilated, sorted, and classified perceptions. According to this view our mind resembles a container in which perception and knowledge accumulate. This view is false.

Expectations, that is dispositions to react, must precede every observation and every perception. Perceptions and observations play a role in modifying our dispositions to react.
- Karl Popper, Objective Knowledge, Appendix I: The Bucket and Searchlight: Two Theories of Knowledge

The “Selection” Argument

The world delivers too much stimulation for any organism to register “as experience” in an unfiltered way. So any perceiving system must select: what counts as relevant, what to ignore, what to treat as the “same thing” over time. Selection requires a prior standard i.e. a guess about what matters. That prior standard is an expectation (a disposition to treat some patterns as significant). Therefore, expectations precede perception, because perception-as-experience is already perception through a filter.

The “Biology/Innate Wiring” Argument

Even very simple organisms react selectively to stimuli (approach food cues, withdraw from threats). Those selective reactions depend on innate dispositions, built-in “preparedness” to treat some inputs as triggers for specific actions. A newborn (and a fetus) has functioning sensory pathways only because a lot of structure is already “pre-installed” (feature detectors, reflex arcs, attentional biases). That pre-installed structure is a set of expectations in Popper’s sense: preparations for certain kinds of environments. Therefore, expectations (dispositions) come first; sense experience modifies them later.

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The Mind is an Ecosystem