What is Yesno?
1.
A means of implying that a question asks only for a positive or negative answer.
"Have you ever seen this man, yesno?"
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2.
yesno - n - having no idea what to say to a given question, but not wanting to look stupid and say that; can also be used as a verb
Lauren: Should I go out with John?
Luke: yesno
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3.
A multidimensional answer to a complex question that is projected into a quasiboolean scalar response value.
Natasha: Are you happy with your job?
Craig: Yesno.