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41 propositions

32 inferences

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Claim

Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless




Arguments

If it is true that...

Melatonin can act as a pro-oxidant at physiologically relevant concentrations

and

Almost any kind of stress increases the formation of melatonin

Then it must be true that...

Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless

If it is true that...

Almost any kind of stress increases the formation of melatonin

Then it must be true that...

Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless


Consequences

If it is true that...

Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless

Then it must be true that...

Bright light contributes to retinal damage in babies

If it is true that...

Melatonin lowers body temperature, causes vasoconstriction in the brain, heart, and other organs, and slows reactions

and

Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless

Then it must be true that...

Retinal injury is caused by ordinary light when the eyes are sensitized by melatonin, prolactin, and polyunsaturated fats