It is not necessary to ask lifetime inclusion to trade dead tokens.

theories/lifetime/at_borrow.v

theories/lifetime/frac_borrow.v

theories/lifetime/lifetime.v

theories/lifetime/lifetime_sig.v

theories/lifetime/model/accessors.v

theories/lifetime/model/definitions.v

theories/lifetime/model/primitive.v

theories/typing/borrow.v

theories/typing/lib/arc.v

theories/typing/lib/mutex/mutexguard.v

theories/typing/lib/rc/rc.v

theories/typing/lib/rc/weak.v

theories/typing/lib/refcell/ref.v

theories/typing/lib/refcell/refmut.v

theories/typing/lib/refcell/refmut_code.v

theories/typing/lib/rwlock/rwlockreadguard.v

theories/typing/lib/rwlock/rwlockwriteguard.v

theories/typing/lib/rwlock/rwlockwriteguard_code.v

theories/typing/own.v

theories/typing/type.v