Questions on comma splices, i.e. commas used to join two independent clauses.
A comma splice is the use of a comma to join two independent clauses in a single “sentence”.
A discussion is available at What is a comma splice? where one example is
The Taylors won a new swimming pool, no one in the family knew how to swim.
Often, the comma-splice can be corrected by replacing the comma with a suitable conjunction.