The Bible contradicts itself

Most of these claims are blatantly spurious. We must recognize, however, that truth is complex.

I was told early in my schooling that water conducts electricity. ‘That’s why,’ declared my teacher, ‘you should be careful about water on laundry floors.’ Years later I was taught that water does not conduct electricity, it is only the impurities in water that allow conduction. Still later I learnt that water does conduct electricity, it is just that it does not conduct it very much. Truth is indeed complex, and in the Bible God has entrusted us with spiritual truth in all its complexity.

The problem with the second level is that it is not testable.  There is no way to refute it, because it's not observable.

It's like if I said "well gravity is really caused by small gnomes you can't in any way observe, and they push you in exactly the same direction that the scientific model of gravity says, but the scientific model of gravity leaves out the main point - that gnomes are pushing us."

You can't prove me wrong, and it doesn't matter, because, pragmatically speaking, we're saying the same thing.