Contradiction in section 7.11

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In section 7.11 Locks, Send and Arc, it seems that the text contradict itself. First in the section "Who holds the lock?" it says:

We can't send a Mutex<Ticket> over a channel, because Mutex is not Clone

However, a bit below in the section "Our challenges", it says:

We can send a Mutex over a channel because it's Send

That's confusing and I'm not sure if we can send a mutex over a channel or not after all.