Then SAS should review the wording on the booking page as the choices are listed as:
Economy - Fixed
Economy - Flexible
Economy Extra - Flex
Economy Extra - Full Flexible
Business Flex - US Domestic Economy
Business - Full Flexible
but the "more information" link shows the flash(y) information chart which has Y and C as "Fixed" or "Fully flexible". "Flexible" is only for M.
Also it would be simple to find a reviewer that would point consistency in wording like: Is Flexible == Flex?