This came up at work. If someone distinguishes between 'man' or 'woman', do you understand that to be a distinction based on sex or gender? Similarly, what if someone distinguishes between 'male' and 'female' - sex or gender? Only the two options (man/woman and male/female) are available so there are no other clues.
I thought one thing and was told another, so thought I would check with those more knowledgeable than me!