[Fester Chugabrew]

What conceivable observation would show ID to be false?

There is none. Observation cannot even take place without intelligent design. It is the given with which science operates. There is no observation either, that can disprove the notion that all we see is the result of an infinite combination of matter over an indefinite period of time cause by some unguided process. Fasifiability is only one logical tool of science. It does not DEFINE it.

[<1/1,000,000th%]

Observation cannot even take place without intelligent design.

In fact Behe has already stated, under oath, that ID requires no physical observations.

[Ichneumon]

[What conceivable observation would show ID to be false?]

There is none.

Thank you. And this is why "ID" isn't science, isn't scientific, and doesn't belong in science classrooms. It's an untestable postulate.