Dr. Craig is a liar.

[RoadRunner79]

We agree, as I've said, that people don't need to understand their beliefs in order to hold them.  

Kudos on that sophistry there.

You think that we can show that x causes y, that we can make a sufficient claim in that regard, -without- answering the question of why x causes y?  How would you propose that be done?
(might you be confusing correlation with causation?  You on;t have to show the "why" to make a sufficient claim of correlation)

Do you believe in physics? Can you explain why physics behaves the way that it does? To my knowledge, we do not yet have a grand unified theory of everything. Scientists still have jobs, and are still asking "why?". If your premise is correct, then can we believe anything, without first getting down to these most basic of questions and answering all of the "why's". In what do you think we can do this?

I can understand your caution of confusing correlation with causation (I think that we need to be wary of that).... And I do agree, that the more information and understanding that we have, the more confident we can that our conclusions are accurate. However I don't think that modernism (absolute certainty... which is impossible) or postmodernism (that we can't know anything) are the answer.

As for an example, I was just talking to a colleague, about a hydraulic press that he was troubleshooting. It is older relay logic machine, and the symptoms didn't make sense together. There where a number of problems in isolated areas of the logic, that where having problems. The motor was dropping out in continuous mode, relays where chattering in manual mode, and it would work when one of the slowdown options where selected, but not the others (which where isolated and turning on the same valve). My recommendation where to isolate the individual symptoms, consider that there could be multiple issues, and if you are not getting anywhere in one area, to move on to another. He came back today, and found a loose wire on one relay. He tightened the terminal, and all of the symptoms went away. There is one part that may be coincidence (although it seemed to be repeatable). For other parts, I may be able to provide a guess as to what was occurring. However I am fairly confident seeing how the machine is running now, and it previously was not, that the loose terminal was the cause, even if I don't understand why for everything.