I've encountered a situation here where the poster of that answer has not only posted rather quickly (before the OP has had a chance to clarify their question), but has also posted two answers back-to-back within barely a minute of each other.
Confident in my belief of the (typically) avoidable multiple answer scenario, and thinking the poster was relatively new and perhaps thought SO was like a forum with conversation threads, I posted a note on the second answer indicating they can simply edit their original post. The OP replied, and I was all set to put fingers to the keyboard in reply when I realized they appeared to be making a fair point with their statement:
...If both of my answers are similar i could have edited, but here 1 is with GSON and another is without GSON...
In other words, they feel that since their two answers are distinct enough, they should be separated in to two individual answers.
I went searching around Meta for some related documentation to support either my or his point, and according to this post, it seems there is a significant amount of agreement to the idea of multiple distinct answers.
Fair enough, maybe I was wrong. But my internal conflict in this case is that since the OP's question is extremely general and has not yet been clarified (at the time of this post), the user's answers are similarly general. The poster is technically not wrong with their answers, but neither are they "correct" in terms of the question at hand, because we simply do not have enough information to give a single direct or concise answer.
Ultimately, I do not know how to respond to that user's question to me. Am I incorrect in this matter, that double-posting "general" answers should not be allowed?
It looks like the poster in question has deleted their first answer (or maybe a moderator did, I cannot tell as I'm not a 10k user yet), so this question might be a bit of a moot point. However, I am still curious about how a situation like this can be handled, and what sort of policies there might be on this (admittedly edge-case) situation to support either his position or mine.