Propositional codes aren't required
A 3rd propositional code required to translate between visual and verbal code would require a 4th code to translate from verbal to propositional code, and a 5th to translate verbal code to the new intermediary code—leading to an infintite regress.
John Anderson, 1978.



CONTEXT(Help)
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Artificial Intelligence »Artificial Intelligence
Can computers think? [1] »Can computers think? [1]
No: computers can't understand images [5b] »No: computers can't understand images [5b]
Images are secondary to propositions »Images are secondary to propositions
Dual code theory explains knowledge adequately »Dual code theory explains knowledge adequately
Dual codes are too indeterminate »Dual codes are too indeterminate
Propositional codes aren't required
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