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laika at Mar 21, 2018 04:18 PM

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Logic 66

anything about what "ought to be thought" as long as there is any complusion of thought on reflection.
In thosecases they only speak of how the facts are.
It is where there is no such complusion that the "ought" finds room.
Thus we are told that we ought to try simple hypotheses before complex ones.
But how such a maxim can be supported upon associational principles alone which is what Mill must mean by laws showing how must think which have been discovered by psychology - I confess I do not see nor do I find anything in Mill's "System of Logic" to help me to see it.
Psychology must depend in its beginnings upon logic in order to be psychology and to avoid being largely logical analysis.
If then logic is to depend upon psychology in its turn the two sciences left without any support whatever are liable to roll in one slough of error and confusion.

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