First of all, what do you want to do as an end result? Display, calculations, comparissons…?
Generally speaking, ChatGPT is correct, it is better to find a standardised way to store stuff. Furthermore, storing digits is way more evolutive than storing emojis or text in general.
If some answers can have 5 different answers, but others only 3. Maybe you can standardise this by attributing different weight to each answer. Basically you can say that “no” is equivalent to the most extreme
and yes is equivalent to the most extreme
.
Explanation :




= [1,2,3,4,5]
No | Dont know | Yes = [1,3,5]