In any debate or discussion, Coherence is the key to a logical argument.
When weighing evidence, it is the explanation that explains all the facts in a logically consistent manner that is the strongest. Coherence is difficult to dispute as a criterion of truth since arguing against it is validating incoherence, which is inherently illogical. This is where I believe Christianity is lacking. Christians are very good at compiling possible evidence to support their beliefs, but many times they ignore or deny the evidence that does not support it.