Is it better to use 2 options instead of 3?

I was wondering what type of answers has the best performance for making decisions and I was wondering the following.
Is it better to use 2 types of answers (“Yes” & “no”) than to use 3 (“Yes”, “Maybe” and “No”)

I am interpreting the question as “Is there an advantage to using fuzzy logic instead of classic predicate logic?” and then the answer is, it depends on your application domain. Both types of logic have their strengths and weaknesses that make them better or less well suited for various jobs. Perhaps if you provide some context, it could help with a more focused response.

Well, my project is based on gathering logs* of a user and their events, based on those logs generating a decision. Which could be:

  • Sufficient data
  • Insufficient data
  • No verdict

I think fuzzy logic is a good match for your application, especially if your log processing can come up with a confidence index (a value between 0 and 1) of how sure it is that the events recorded are sufficient to make a clear decision. You will need a membership function to define your fuzzy sets.

Hope that helps.

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