There is no concreteFor autonomous sensorimotor systems like us, all objects, whether primroses or prime numbers, are abstractions

What autonomous systems can dosee (sense, perceive, discriminate relatively)learnrecognize (categorize kinds and individuals, discriminate absolutely))manipulate (Manipulate)name (identify)describe

AbstractionDetecting invariants in varianceFeatures/parts/relationsSensorimotor interactionsGibsonian affordances

Foundations of AbstractionBorgess Funes the MemoriousLuriass S: The Mind of a MnemonistWatanabes Ugly Dckling Theorem

Millers Magical Number 7 +/- 2

DiscriminationRelative Discrimination: same/different judgments, analog matching, similarity judgment, more/less magnitude judgment, Just-Noticeable-Differences (JNDs)Absolute Discrimination: (recognition, identification, sorting/labeling, naming)

Informational capacity limitsRelative discrimination: JNDsAbsolute discrimination: chunksSerial memory limitsRechunkingRecodingInvariance extraction

Categorical perceptionImplicit/Explicit learning/knowledgeChicken-sexing Biedermans geon analysis

3 ways of getting categoriesDarwinian theft (innately prepared feature detectorsSensorimotor toil (trial and error learning of categories from experience, with error-corrective feedback, knowledge by acquaintance) Symbolic theft (learning from hearsay: knowledge by description, language)

How do autonomous systems access objects?Through category detectionAll category detection depends on abstraction: selectivity, invariance extractionObjects are whatever affords absolute discriminability, whether kinds or individuals, from primroses to prime numbers