Why? Alan2 is only applying the same standard of proof you outlined. What makes you faith better than his in regards to 'scripture'.
The standard of proof of this thread (read the article!) is precisely that the standard of proof is not the scripture. Unfortunately, the author reverts to quoting scripture immediately after setting the standard to the contrary!
Scripture is what a believer considers scripture. It's tangential on an a priori human acceptance of something as scripture. That's why scripture cannot be a proof.