ml wrote:
hi

Over the years, I've found it interesting and disturbing even
confusing, that there seems to be so much confusion regarding the
above.

Nothing gets a post responce, like the above topic and boy those
threads quickly grow to large numbers

I always read them trying to learn as well as books on the topics,
i don't pretend to have any formal engineering /scientific
knowledge just enjoy reading what i can

but i ponder why there seems to be so many opposing /contradicting
views on same subjects and topics and i am not referring to just
those here on the news groups


Several reasons..
1) the terminology isn't necessarily consistent in its definition

2) the things get used in a complex system with lots of interactions, so
it's hard to separate out the effects of the function of component A
from those of components B,C,D, and E.

3) there's a host of empirical evidence out there that seems to
contradict the theoretical behavior of A (mostly because the empirical
evidence also includes the behaviors of B, C, D, and E, which aren't
always controlled for or understood). So you wind up with "A does X" in
system 1, and "A does Y" in system 2.