I know you know what a sentence fragment is, and I know you know it's a breach of the rules of grammar. But some grammar rules should be broken from time to time--and the rule banning sentence fragments should be at the top of the list.
Consider this example from Casual Kitchen:
Here's another option: Consider uninstalling this limiting belief. Or at least seek out evidence contradicting it. Not only will you find plenty of examples, you'll save plenty of dough too.
The second sentence in this quote (Or at least seek out evidence contracting it) is a sentence fragment. To correct it, you'd need to connect it with the prior sentence in a conjunction:
Here's another option: Consider uninstalling this limiting belief, or at least seek out evidence contradicting it. Not only will you find plenty of examples, you'll save plenty of dough too.
Except that the "corrected" version is worse. The prior version, with its series of rapid-fire short sentences, reads with more urgency and has a superior cadence. The difference is subtle, and to most readers probably unimportant. To me, however, the grammatically incorrect version carries more force and weight.