If you start typing an answer on e.g. chemistry SE, a pop-up appears which says, among other things: "Please be sure to answer the question." I took this to mean: provide a complete answer, not a partial answer or a hint.
(In at least one case, I saw one question where I knew a partial answer that would have helped, but I thought that would get downvoted for not being a complete answer, so I did nothing.)
However, if you follow the link to "tips on writing great answers":
says "Help us find a solution by researching the problem, then contribute the results of your research and anything additional you’ve tried as a partial answer." And: "Any answer that gets the asker going in the right direction is helpful, but do try to mention any limitations, assumptions or simplifications in your answer."
(I know these are customizable by the individual SE sites, but this wording is from the default SE templates.)
So I understood "Please be sure to answer the question" to mean no partial answers or hints. But it sounds like it actually meant: "Please provide something in the direction of a standalone answer, as opposed to asking for help or responding to another answer."
I think it would be more clear to have, after the words "answer the question": "Partial answers are acceptable if they contribute towards finding a solution; hints are acceptable if you think they will help the question author find the answer on their own." (So of course this would be a suggestion for the default template, although I'd have to take it up with Chemistry SE, Physics, etc. if I wanted them to change their custom versions too.)