The impossibility of self-prediction refuted

From online source:

"McCloskey's claim that self-prediction is impossible fails for the
same reason. He states:

"The impossibility of self-prediction has
become a commonplace in philosophy. You do not know today what
you will decide tomorrow, unless you have already decided it, in which
case it is not tomorrow but today that you decided it" (p. 130).

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"Is that
so? I know what I shall have for breakfast tomorrow, but I have not
now decided what to have. That I shall do tomorrow. The impossibility
involved in this last remark I am entirely unable to fathom."