[AndrewC]

Your assertion is that one cannot patent something that one does not understand.

Reread what I "asserted"

I think someone might have difficulty getting a patent for something that they cannot explain the workings, but you never know

I provided evidence of a pretty concise description of a device and how it worked in a patent.

[CobaltBlue]

According to my husband, what is required in a patent application is that the device be described with sufficient certainty that it can be constructed by someone who is learned in the art.

Upstream somebody said that a computer program has designed a circuit and that the device in question has been built but the engineers are not really sure how it works.

If they built it, they can certainly describe how they built it with sufficient certainty that a replica can be constructed by someone who is learned in the art.