Not if they were explicitly offering unlimited fries.
In that case they would be indisputably unreasonable, in its dictionary definition of “having no basis in reason or fact”, where reason and fact are that they offered unlimited — not 5 pounds — but unlimited fries with any hamburger.
In that case they would be indisputably unreasonable, in its dictionary definition of “having no basis in reason or fact”, where reason and fact are that they offered unlimited — not 5 pounds — but unlimited fries with any hamburger.