Hi@summitb,
Could you please share a bit more about the scenario:
- what do you mean that “if I don't know if the answer is yes or no”?
- how do you know the answer?
Please give me the answer to the above questions.
I assume that every time you create a new record, you should select the answer from the two-option-set column, and you want to leave this column empty if you don't know the answer.
If my understanding is correct, I can tell you that the two options type field could not be assigned to a blank value. The two options will always have a default value, either "Yes" or "No".
If you would like this feature to be added to PowerApps, please submit an idea to PowerApps Ideas Forum:
https://powerusers.microsoft.com/t5/PowerApps-Ideas/idb-p/PowerAppsIdeas
To achieve your needs, you could consider creating an option set field. This operation will return a blank value if you do not have a selection from the option set field.
Hope it could help.
Best Regards,
Qi