IFR has nothing to do with weather!
Whopity, Not so given the context of the discussion.
There must have been some kind of cockup here when someone wrote 'IFR' when they really meant 'IMC', or '...in circumstances where IFR flight is required'
A
VFR only privilege means only VFR and, by definition, only VMC
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VMC only privilege means VFR or IFR, but for IFR to be allowed depends
totally on the weather.