I notice a lot of questions asking about whether certain tools are "useful" or "effective" or which languages are more "difficult"/"easy" to learn. Though these questions may seem imprecise and vague or opinion based (ie. what does "useful" mean?), it seems that if the interpretation of these words had a more concrete definition or use-case on this site, these questions would be more well-defined.
For example, asking if a tool or technique is "useful" may be interpreted here as what studies have been done or what data there is regarding that tool or technique and some metric used to define it in (possibly) quantifiable terms.
Should we have a lexicon or terminology list for framing the interpretation of certain "imprecise" words? (I am not suggesting introducing new terms, but providing a consensus on the meanings of commonly used words.)
Could we add tags in Meta regarding "terminology" or "glossary" to discuss these?