There are two slightly different expressions which do mean the exact same thing, these are:
- On the one hand [...]. on the other hand [...]
- On the one side [...]. on the other side [...]
Is using side here correct? I'm sure the hand version is tremendously widespread, whereas the side version just shows up from time to time.
My English teacher always told me "'on the one side..., and on the other...' does not exist!", however I do see it sometimes.
So is it grammatical or not?