In reply to:

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boolean isDevil = (hasQuestionColon) ? ((hasMoreThanOne) ? true : false) : false

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Using conditional operator with only true or false as results is just gratuitous obfuscation

More than one on the same line is bad, but I have no problem with multiple ?: operators if they are laid out as if-elseif-elseif-else (which is great because you don't need loads of parens), or as a binary chop or some other recognisable structure, with a line for each test and each result, and indented sensibly.