hey skyking,
"Theory is sometimes derived as a speculation of ideas, assumptions, conjecture"
in a court of law, for example, yes. as per how scientists use the term "theory", no.
the late stephen j, gould touched on exactly this:
In the American vernacular, "theory" often means "imperfect fact"--part of a hierarchy of confidence running downhill from fact to theory to hypothesis to guess. Thus the power of the creationist argument: evolution is "only" a theory and intense debate now rages about many aspects of the theory. If evolution is worse than a fact, and scientists can't even make up their minds about the theory, then what confidence can we have in it? Indeed, President Reagan echoed this argument before an evangelical group in Dallas when he said (in what I devoutly hope was campaign rhetoric): "Well, it is a theory. It is a scientific theory only, and it has in recent years been challenged in the world of science--that is, not believed in the scientific community to be as infallible as it once was."
http://www.talkorigins.org/faqs/evolution-fact.html
peace out,
tetra