I went back and read it again, though I had found it a waste of time the first time through. I think the third paragraph is more clear: "We just don’t know thos

I went back and read it again, though I had found it a waste of time the first time through. I think the third paragraph is more clear: "We just don’t know those forces well enough to even name them" I feel like he's straining too hard to make the analogy with physics, which doesn't seem very beneficial. Spoken as a fan of both physics and software, the analogy with physics just doesn't seem to offer much additional perspective on the target field (software). Civil engineering seems like a better analogy (constructed artifacts involving engineering tradeoffs that must work in a complex environment), or biology (evolving systems responding to selection effects in complex, evolving environments).