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41 propositions
32 inferences
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Claim
The retina responds to ordinary light
Arguments
If it is true that...
Visible light is biochemically active
Then it must be true that...
The retina responds to ordinary light
Consequences
If it is true that...
Visible light is biochemically active
and
The retina responds to ordinary light
Then it must be true that...
Nervous impulses from the retina only have the small privilege of "setting the clock"