System reliability can be more reliable than some critical subsystems depending on the archiitectural design

[david-a-wheeler]

In 6.5.1:

A system is only as reliable as its least reliable critical subsystem

That's clearly not true, since error-correction mechanisms and redundancy can dramatically increase the reliability of a system even with less-reliable subsystems. Modify this, e.g.:

In many systems, depending on their architectural designs, a system is only as reliable as its least reliable critical subsystem. ...

[Derek-Jones]

Yes, some nuance needs to be added to that overly broad assertion.

I will try to come up with a data driven solution.