Do not use ? at the end of boolean function

[friedger]

In clarity functions, the question mark is used to indicate optional or wrapped results, e.g. to-consensus-buff?

There should be code guidelines that suggest to not use question mark for boolean results, example has-duplicate-chars?

[ryanwaits]

ah ok - thats my ruby background overriding my clarity 🙃

[friedger]

I'll try to provide more references for my statement in this issue..