premise: Then , too , there have been the campaigners who have gone to what some regard as opposite if the head of a committee is known to be a man or a woman , then chairman or chairwoman must surely be the proper denotation ; if the sex of the person is not known , then chairperson , though awkward-sounding , is the preferred form .
hypothesis: Then , too , there have been the campaigners who have gone to what some regard as opposite if the head of a committee is known to be a man or a man , then chairman or chairwoman must surely be the proper denotation ; if the sex of the person is not known , then chairperson , though awkward-sounding , is the preferred form .