On some Stack Exchange sites it is unclear to me which answer to accept as correct. For example, sites such as lifehacks, scifi and personal productivity, give theories and tools, several which (or a combination) may be right. In this example I asked how to tell if a surface is level however I used solutions from multiple answers at some point in time.
Which answer, if any, should be marked as correct? Is there pressure to mark any answer as correct? I guess I always assumed the correct answer is the one actually used. IMO there shouldn't be pressure on accepting an answer, however there often is from those who posted the answer as they would get more points for an accepted answer.