Skidmore Guide to Writing Index
A comma splice occurs when a comma is used incorrectly in place of a semicolon or without a coordinating conjunction to join two independent clauses.
Here's an example of a comma splice:
The problem here is that a comma is being used to join two independent clauses, but we've forgotten also to use a coordinating conjunction. Here's how the sentence would look revised correctly:
Notice that we added the coordinating conjunction "but" after the comma.