Why is there a time limit on editing forum comments?

The ability to edit your comments is limited in order to preserve the continuity of the thread. As an extreme example, if everyone who posted in a thread heavily edited his/her posts multiple times over a period of days, the thread would no longer make any sense. People would be responding to statements no longer there, etc. Moderators and site admin. can edit posts beyond the time limit in rare cases where that’s necessary.

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