X is contrary to reason only if (X is a representation and X is not similar to what it represents).

X is a passion only if X is an original existence (or modification thereof).

X is an original existence (or modification thereof) only if X is not a copy.

If X is not a copy, then X is not a representation.

Therefore, if X is a passion, then X is not contrary to reason.

Form:

	If I then R and not S.
	If P, then O.
	If O, then not C.
	If not C, then not R
Therefore,	If P, then not I.