> > An engineer's model must be tightly bound to the laws of physics and chemistry.

> Anything that exists in reality and is observable by definition is tightly bound by the laws of physics and chemistry. Software is too.

No. Software is only loosely bound by physics and chemistry. Sure, the bounds exist - they're real - but most software, most of the time, does not bump into them much at all.

But

> > An engineer's model must be tightly bound to the laws of physics and chemistry.

is also wrong. This is using a pre-software definition of engineering to try to define software engineering. It would be like trying to use a pre-Faraday definition of physics to define microwave engineering.