yesno dimension with several conditions

[bonomi]

Hi folks, I must be extremely dense, but I can’t get this to work and I can’t seem to find an example here that does the same thing.

I’ve tried some case whens, I’ve tried some sql ifs, but no luck.

Could someone please help me convert this custom field into a working dimension I can use to filter with?

if(${question_id} = "text" AND is_null( ${answer_label}), "yes","no")