In other words how do non-physical ideals or beliefs bear on or influence the processes of the physical brain?
(1) If materialism is true, then causal closure is true.
(2) If causal closure is true, we cannot have knowledge of any non-physical, abstract objects.
(3) The laws of logic are non-physical, abstract objects.
(4) If materialism is true, we cannot have knowledge of the laws of logic.
(5) Knowledge of the laws of logic is required in order for our rational inferences to be justified.
(6) If materialism is true, we cannot make justified rational inferences, including the inference that materialism is true.
(7) Therefore, materialism is self-defeating (and “has no right to claim that it can be supported by rational argument”).
OR
(1) If naturalism is true then we do not reason.
(2) We reason. Therefore,
(3) Naturalism is false.
https://prism.ucalgary.ca/bitstream/...pdf?sequence=1
(2) If causal closure is true, we cannot have knowledge of any non-physical, abstract objects.
(3) The laws of logic are non-physical, abstract objects.
(4) If materialism is true, we cannot have knowledge of the laws of logic.
(5) Knowledge of the laws of logic is required in order for our rational inferences to be justified.
(6) If materialism is true, we cannot make justified rational inferences, including the inference that materialism is true.
(7) Therefore, materialism is self-defeating (and “has no right to claim that it can be supported by rational argument”).
OR
(1) If naturalism is true then we do not reason.
(2) We reason. Therefore,
(3) Naturalism is false.
https://prism.ucalgary.ca/bitstream/...pdf?sequence=1
Comment