(no subject)

[zhansheng]

The proposition (say, q) that we know in this case is not the same as the proposition (say, p) in which we have a probable degree (say, a) of rational belief. If the evidence upon which we base our belief is h, then what we know, namely q, is that the proposition p bears the probability-realtion of degree a to the set of propositions h; and this knowledge of ours justifies us in a rational belief of degree a in the proposition p. I t will be convinient to call propositions such as p, which do not contain assertions about probability relations, "primary propositions"; and propositions such as q, which assert the existence of a probability relation, "secondary propositions".

-John Maynard Keynes

KI is cool stuff.