The original “Is and Ought" post

Not only is it possible to make inferences from is to ought, that is, from descriptive premises to evaluative conclusions -- but it is also possible to make inferences from ought to is.

An example of an inference from is to ought:

Pregnancy is not a disturbance of natural function, but is itself a natural function.  Hence it is wrong to view it as view it as a disease which can be "treated" by abortion.

An example of an inference from ought to is:

Lying is wrong.  This precept discloses to us that the social practice of conversation is ordered to the mutual discovery of truth -- to a cooperative endeavor to bring thought into alignment with how things really are.

Tomorrow:  Of Acorns and Men