 Generality is obviously useful. Often, lessons about a particular \(F\) can be projected to other \(F\)s in virtue of their common \(F\)-ness. When a girl learns that her cat has a nictitating membrane that protects its eyes, she rightly expects her neighbor’s cat also has a nictating membrane. Generality saves labor. When the girl says that she wants a toy rather than clothes, she narrows the range of acceptable gifts without going through the trouble of specifying a particular gift. The girl also balances values: a gift should be intrinsically desired and yet also be a surprise. If uncertain about which channel is the weather channel, she can hedge by describing the channel as ‘forty-something’. There is an inverse relationship between the contentfulness of a proposition and its probability: the more specific a claim, the less likely it is to be true. By gauging generality, we can make sensible trade-offs between truth and detail.