Yes, No, Maybe
are words reflective of viewpoints on the spectrum of belief and unbelief. If
the spectrum is pictured as a linear indicator, then 'Yes' is dogmatic faith at one end, with 'Maybe' representative of uncertainty or doubt in the middle and at
the extreme other end stands 'No' which
conveys firm nonbelief.
The range is from Absolute Belief to Absolute Non Belief
with Lack of Belief somewhere in between the two poles.