yellowho wrote:Adam,
I guess what is the definition of a run-on sentence then? So as long as you have a coordinating conjunction the sentence is not a comma splice error but it still can be a run-on sentence right?
The phrases "run-on sentence" and "comma splice" are almost identical in meaning and usually interchangeable. You can have a run on that isn't a comma splice if you just drop the comma altogether:
"My mother is always annoying me I am never calling her again."
However, the definition of a run-on sentence is irrespective of the presence or absence of a comma: it's a sentence with more than one independent clause, improperly joined.
Keep in mind that you can have a coordinating conjunction but still have a run-on sentence, as it's possible to have 3 clauses (or more) with only 1 proper connector. This is actually not uncommon on the GMAT. Look at this crazy example:
I went to buy a new car, which admittedly I desperately needed, from a new dealership in town; after I researched all of the recently-opened businesses that had begun to propagate throughout the area where I lived, I settled on one that was clearly the best, and I went there in the afternoon to make my purchase, I was extremely happy.
There are lots and lots of verbs in there, but only one of them -- [spoiler]the "was" at the end[/spoiler] -- is added on without being in a dependent clause OR being connected acceptably. Thus, it is a run-on sentence; without
those final 4 words, it is completely acceptable.