Much of the time the truth does indeed lie between two extreme points, but this can bias our thinking: sometimes a thing is simply untrue and a compromise of it is also untrue. Half way between truth and a lie, is still a lie.
Example: Holly said that vaccinations caused autism in children, but her scientifically well-read friend Caleb said that this claim had been debunked and proven false. Their friend Alice offered a compromise that maybe vaccinations cause some autism, just not all autism.
More logical fallacies here: http://yourlogicalfallacyis.com/ !
(source: Skeptical Inquirer, July 2012)