Strip out the engineer from the statement. The only ones that have learned all they can are sadly no longer with us. As for the appllication of engineering principles, there are always new ways to skin that cat.

My father, whose surname was trailed by a sizeable selection of the alphabet, always maintained that you never really know what you think you know, just how you interpret what you think you know, and you always change the interpretation to suit the need.

__________________
Gravity is a harsh mistress
SAM 002
NAR 91005
"The complexity of living is eminently favored to the simplicity of not."