Make abstract quiet time bool
In the lemma I'm working on now, I need a bool version of this definition. As we discussed, we should avoid two identical versions (Prop + bool) whenever possible. So, this MR makes the quiet time def. to be bool
In the lemma I'm working on now, I need a bool version of this definition. As we discussed, we should avoid two identical versions (Prop + bool) whenever possible. So, this MR makes the quiet time def. to be bool