Synthesis would occur twice as often if we presented both fonts individually to the user and they chose to embolden them anyway:
Ubuntu Light -> [click bold] -> Synthesised Ubuntu Light Bold Ubuntu Medium -> [click bold] -> Synthesised Ubuntu Medium Bold
Synthesis would occur twice as often if we presented both fonts individually to the user and they chose to embolden them anyway:
Ubuntu Light -> [click bold] -> Synthesised Ubuntu Light Bold
Ubuntu Medium -> [click bold] -> Synthesised Ubuntu Medium Bold