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40

have no doubt a bearing upon ^{metaphysical and upon other} vexed questions; but upon these
questions themselves. I have no time to touch. I am not then talking
Metaphysics: I am notstill less am I talking Epistemology.

Kant has a famous distinction between constutive
constitutive truth principles & regulative truthprinciples. A constitutive
principle expresses what is so, whatever
that may mean. A regulative principle expresses
how you must think about a matter in order
to attain your [purposes ??], whether it be so, or not.

For example, in a hand of whist, when there are only
three rounds remain to be played and you have the lead
you must think of the cards as lying so that it will
be possible for you to win the odd trick, although you
have no evidence that it is so. You must think so,
because if it is not so, your thinking it is cannot can

40

have no doubt a [bearing ??] upon metaphysical and upon other vexed questions; but upon these
questions themselves, I have no time to touch. I am not then talking
Metaphysics: I am notstill less am I talking Epistemology.

Kant has a famous distinction between constutive
constitutive truth principles & [regulative ??] truthprinciples. A constitutive
principle expresses what is so, whatever
that may mean. A regulative principle expresses
how you must think about a matter in order
to attain your [purposes ??], whether it be so, or not.
For example, in a hand of [whist ??], when there are only
three rounds remain to be played and you have the lease
you must think of the cards as lying so that it will
be possible for you to win the odd trick, although you
have no evidence that it is so. You must think so,
because if it is not so, your thinking it is [cannot ??] can