If there are any reflexive verbs built by adding reflexive marker and an affix (or a predicative adjective, etc.), some of these are derived from intransitives (cf. smoke => smoke oneself sick).
Standardized
IF there are any reflexive verbs formed by adding a reflexive marker and an affix (or a predicative adjective, etc.), THEN some of these are derived from intransitives.
Cf. #1579. The example tells what is really meant; the wording of the universal doesn’t.