While hillary thought her grandpa looked very distinguished with his gray hair, she thought that gray hair made her grandmother look old. hillary is demonstrating the idea of

Hillary is demonstrating the idea of a double standard where principles and rules are being applied towards other things such as group or people in which the applied rules or principles are being unfairly treated. It could be seen above as Hillary applies the principle of being old just because her grand pa is old and has grey hair, making it seems to her that when her grand ma has grey hair she is old as well.