Science classify several eatables, which in layman vernacular are called vegetables, to be fruits and vice-versa. Kind of oxymoron in itself.
For example:- Tomato, Cucumber, Chilli, Capsicum, Bell pepper, etc are all popularly taken as vegetables although, are technically fruits.
And similarly:- Okra, Grean peas, etc, although popularly held as vegetables are technically fruits.
Generally during a fast, we are told by elders and priests that we can consume raw fruits while observing a vrata or upavāsa, but must not consume vegetables in any form whatsoever.
Thus, my question being, wrt to the technical-scientific classification of fruits and vegetables, how the above situation of what to eat and what not to eat during a fast, is resolved as per ayurveda classification and other scriptural injunctions regarding the same?
More importantly, In anyway does this kind of oxymoron classification actually exists in anyform within the Hindu systems?