When an scholar offers a definition in one of his works, should it be such that it is not refutable because no other definition would be better then his/her?
Put in other way: after all, what makes a definition the _sole answer_ to the question "what is......?"
E.g., say one defines the word "genocide."
S/he defines it as "deliberate extermination of a people or nation," is this definition "complete" or does it need further information to make it "complete?"
If there is a better explanation, does it supersedes and/or replaces the above?