I was about to do a substantial rewrite of an answer I wrote but the rewrite would change well more than half the original answer (partially due to straying too far off topic). It occurred to me that deleting that answer and just writing a new one. What is the community view on this: delete and post new answer or just rewrite completely?
For reference my offending answer is in this question ( Does wearing a bicycle helmet make the cyclist safer? ) but I'm not asking here about the specifics there, just the general point of whether rewriting is better than deletion and replacement.
It looks to me like something that is likely to occur frequently so a nice definitive ruling would be good.