In case you didn't know, whenever you post the exact same answer as was already posted, it gets converted to a comment.

I had no idea before I posted a crack on a cops-and-robbers post that someone had posted 5s before.

I didn't know what happened before someone asked me why I commented on the question. I was confused for a bit until I figured it out.

While this may make sense for a Q&A site, it doesn't make sense for PPCG. 99% of the time, 2 people had the same idea at the same time.

## Here's what I'm proposing:

When you post a duplicate answer, this message appears:

• I fell it's usually hard for program to decide what's exact duplicate. Maybe some explaining expression that don't effect at all. – l4m2 Apr 13 '18 at 6:31