How Does One Avoid Bias? What If it's Impossible to Corroborate the Resurrection?

From time to time I'll add some discussion about my anthology The Case against Miracles. Click on the Tag Case against Miracles below for more entries.

This comes from a discussion on Bart Ehrman's blog, which I've been made a temporary moderator.

Question:
How does one deal with and avoid a specific bias towards secularism in one’s intellectual work? I ask because there is no doubt such a bias exists, and there is no doubt that it debilitates rational thought just as readily as any other bias. The question is this: how do those of us who experience such a bias make sure our conclusions are not affected by a prejudiced reading of the evidence?

Loftus: The bias in deference to sufficient objective evidence is far superior to the bias in deference to what one was raised to believe, or in deference to mere 2nd 3rd 4th handed TESTIMONIAL evidence in the ancient pre-scientific superstitious world, which cannot be cross-examined for truth or consistency. Yes?

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Question: What if it's impossible to corroborate the resurrection of Jesus with objective evidence as you require?

Loftus: When it comes to believing in a resurrection from the dead in the distant superstitious past it requires strong and/or numerous pieces of corroborating objective evidence, unlike ordinary events. We don’t have it for the resurrection so there’s no reason to believe it.

It may even be impossible to corroborate a resurrection in the distant past, but that doesn’t change our need for sufficient objective evidence. Such a god should have waited until modern science had arrived for the ability to confirm it.

Reason itself demands this. If your god is a reasonable deity who desires us to be reasonable with the evidence, then when I say reason itself demands this, your god demands it. Or, your god created us to be reasonable people yet desires us to be unreasonable.