> you can ask them which language of their daily-used is based on ternary logic (hint: one for DB queries) and they'redone. It might be better to phrase this a

> you can ask them which language of their daily-used is based on ternary logic (hint: one for DB queries) and they'redone. It might be better to phrase this as "tri-state logic"; that's the usual term in electrical engineering, and is probably more familiar to programmers. When you said "ternary logic", I thought this was referring to the language philosophy, and spent a few minutes trying to work out how SQL was based on ternary expressions. Though, if you're testing your interviewees' ability to ask sensible follow-up questions (and they're in an environment where they expect to be expected / permitted to do so), then perhaps the confusing use of terminology is okay.