He had long known that his mother did not love him, and he accepted her pride in him as a reasonable substitute.
For all of Fletcher's pious posturings, he was not God or even a reasonable substitute.
Everyone but the Medievalists knew that there was no substitute, no reasonable substitute.
If there are reasonable substitutes for your work, and those substitutes are seen as cheaper, then you're not going to get the work.
Cornelissen make a reasonable substitute but other commercial manufacturers, such as Pelikan, offer it too.
For people who avoid alcohol, red grape juice is a reasonable substitute.
Public schools will never be a reasonable substitute for private schools.
This allows the officer the ability to use the shotgun as a reasonable substitute for a rifle at medium ranges.
So the testers bought what seemed a reasonable substitute, oil of wintergreen.
But it is also clear that reasonable substitutes will do.