On Validating Inputs
https://noncombatant.org/2018/01/15/on-validating-inputs/ [noncombatant.org]
2018-01-16 13:50
If the input language is sufficiently complex — which is all too likely in the real world — it might be impossible to write a safe validator. In this case, we have a paradox: the RP can only trust itself to validate its inputs, but cannot safely do so.
source: grugq