Here is one of the places where estimates may be inevitable.

If they are inevitable, they should be estimates, not guesses, and a note should be made of the process by which they were reached.

The difference between an estimate and a guess is that an estimate is the result of a definite train of reasoned calculation and a guess is not.

For an estimate reasons can be given, for a guess none other than--it occurred to me.
II.

The Mission which has no Defined District.
We believe that the vast majority of missions accept a territorial district; but there are missions where the station district has not and cannot be defined.
The idea of the mission is not territorial.