Independent clauses must be separated by proper punctuation, either through the use of a period, semi-colon, or, sometimes, a colon. Commas can be used to separate independent clauses only if they are used with a coordinating conjunction. Comma splices and fused sentences are different errors, but they produce the same grammatical problem of juxtaposing two independent clauses without proper punctuation between them.
Comma splicesA comma splice occurs when a comma rather than a period separates two complete sentences
To use a comma to separate independent clauses, the writer needs to employ a coordinating conjunction (and, but, for, or, nor, so, and yet):