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Comma Splices
I have heard the term “comma splice,” but was not sure when a comma was or could be spliced.
Grammar Girl explores that subject on her podcast this week. Her conclusion demonstrates and explains the issue:
So, I hope you get it! Commas aren't meant to join main clauses all by themselves; to force them into that role is to perpetrate a comma splice. That's bad, but it's easy to fix.