What British academic philosopher has this quote attributed to him regarding the principle of charity "it constrains the interpreter to maximize the truth or rationality in the subject's sayings."?
Principle of charity In philosophy and rhetoric, the principle of charity requires interpreting a speaker's statements to be rational and, in the case of any argument, considering its best, strongest possible interpretation. In its narrowest sense, the goal of this methodological principle is to avoid attributing irrationality, logical fallacies or falsehoods to the others' statements, when a coherent, rational interpretation of the statements is available. According to Simon Blackburn "it constrains the interpreter to maximize the truth or rationality in the subject's sayings."
Moral universalizability The general concept or principle of moral universalizability is that moral norms, facts, predicates, etc. apply universally; that is, if they apply to one person, they apply to everyone. Some philosophers, like Immanuel Kant, Richard Hare, and Alan Gewirth, have argued that moral universalizability is the foundation of all moral facts. Others have argued that while moral facts are constrained by moral universalizability, this constraint is too weak for grounding substantial moral facts. A few have also argued that morality is not constrained by universalizability at all.