This thread is so creepy, every other reply is from a different Amazon account.
Makes me think of another mnemonic for subtyping: S <: T when id : S -> T is well-typed.
"Our language comes with a subtyping relation T <: S that tells when it is safe to use elements of T in a context that expects elements of S."
#Coq Coq Correct: Verification of Type Checking and Erasure for Coq, in Coq
hey you know what's cute?
RepRage – How Banksy Authenticates His Work