When we look at our conclusion, we realize there's really not a new thought happening there. That was just a correctly derived conclusion. Effective teacher implies power to make classroom decisions. So I don't have to worry about whether or not there were assumptions that we should also be treating as true, because this argument was actually a valid argument. The conclusion just summarizes our conditional chain. If we're going to find something that must be false, then we have a big old conditional chain, then we should again be reminding ourselves, that's going to sound like you are the trigger, which are not the outcome.