Will_Sawin comments on Conceptual Analysis and Moral Theory - Less Wrong

60 Post author: lukeprog 16 May 2011 06:28AM

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Comment author: Vladimir_Nesov 16 May 2011 11:00:12PM *  1 point [-]

You don't need to know what "should" means, you just need to do what you should do and not do what you shouldn't do.

But better understanding of what "should" means helps, although it's true that you should do what you should even if you have no idea what "should" means.

Comment author: Will_Sawin 17 May 2011 01:41:27AM 0 points [-]

If knowing what "should" means helped something, then knowledge of a definition could lead to real actionable information. This seems, on the face of it, absurd.

I think either:

"XYZ things are things that maximize utility"

or:

"XYZ things are things that you should do"

can count as a definition of XYZ, but not both, just as:

"ABC things are red things"

pr

"ABC things are round things"

can count as a definition of ABC things, but not both. (Since if you knew both, then you would learn that red things are round and round things are red.)