The O.P's question was about how to correctly expose for a fair skinned blond sitter outdoors in daylight and that's what I answered there was no mention in the question about the background exposure, lighting control, fill in flash or any other elements of the picture, indeed he doesn't even say if he's shooting negative film or slide film in the original post although everyone has assumed it's monochrome neg. film, which could make it a completely different ball game
My apologies if it seemed that I was contradicting you. You are absolutely correct in that if the primary subject is over exposed an error has been made.
I agree that there are a fair amount of unknowns.
I was just addressing more advanced possibilities to solve the problem; your post provided an easy way to show that.
It is my belief that all to often many of the best options we have to improve our exposures are left at home or in the car. Scrims, flashes, reflectors, filters, lens hoods, spot meters, gray cards, incident meters, shot notes, whatever....
It is of course ok not to use these tools by choice, but it is nice to know they are available.
For me the choice is do I want all my subjects properly on film or do I want to control their exposure in the enlarger?
There isn't a right answer to the question as I see it.