potato comments on Against Modal Logics - Less Wrong

27 Post author: Eliezer_Yudkowsky 27 August 2008 10:13PM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (59)

Sort By: Old

You are viewing a single comment's thread.

Comment author: potato 17 September 2011 05:29:46PM *  4 points [-]

Modal logic doesn't tell you if some sentence is possible or necessary, it tells you what sentences must have what modal values given some other sentences with some prespecified modal values. Just like Komolgorov doesn't tell you that the probability of a die landing on any face is 1/6, and that it can't land on two values, it just tells you that given that, the probability of the die landing on an even value is 1/2.

Komolgorov and Bayes seem to me to be guilty of the same sort of bouncing, but i think Bayes and Komolgorov are clearly useful tools for the study of rationality. Modal logic does not define possibility, and it certainly does not reduce the notion of modality to anything, but it does constrain the assigning of modal values to fields of sentences. Any philosopher that argued otherwise is prolly a noob.

But, in general I agree with you. I am a philosopher, or at least that's my major, and i agree that: It is only by extraordinary competence that philosophers ever produce useful reductions; that's something I hope to change by going into the field. And btw, I plan on using your work all the time to help me make that happen. So would it bother you, or seem strange, if i called you a philosopher, Eliezer? Cause I honestly say that your one of my favorite philosophers, if not my favorite, often enough, and i would find it funny if my favorite philosopher, didn't even consider himself a philosopher at all, and wasn't all that intimate with the literature. It's a fact I'd like to know for personal amusement.