If you advocate a point in the middle, you’ll have a hard time justifying the choice of that particular point, as opposed to one further up or down.
Trouble with justifying does not necessarily mean that the choice is unjustified.
I like to wash my hands in warm water. I would have a hard time justifying a particular water temperature, as opposed to one slightly colder or slightly warmer. This does not mean that “the only points which have a good reason to be used” are ice-cold water and boiling water.
You can’t justify a point, but you could justify a range by speficfying temperatures where it becomes uncomforable. Actually, specifying a range is just specifying the give point with less resolution.
Trouble with justifying does not necessarily mean that the choice is unjustified.
I like to wash my hands in warm water. I would have a hard time justifying a particular water temperature, as opposed to one slightly colder or slightly warmer. This does not mean that “the only points which have a good reason to be used” are ice-cold water and boiling water.
You can’t justify a point, but you could justify a range by speficfying temperatures where it becomes uncomforable. Actually, specifying a range is just specifying the give point with less resolution.