Yes. But theory is not fact. Theory IS what you work from. You work to prove or disprove the theory. until you can prove it its not a fact. I think we can all find ways to prove gravity.
Yes, there are two general definitions for Theory.
One is the common usage, as in, "Well, it will work in theory..." This is the misunderstood concept. Because the implication is the concept is workable but we aren't sure, but the inference is that it works, but anything is possible. It's correct usage because it's common usage.
The second and original meaning of theory is it's intended usage. Since logically one cannot determine something to be an absolute fact due to not having all the information, there is a theory behind everything. "There's always something new." I. E. there's no end to data. Once something continuously shows itself as an immutable and recurring "thing," it's then described as a "law."
Theory is an abstract
, not a speculation. Theories are actually fact.
Saying things "aren't real," because it has the label theory
added to it, is ignoring the measurable, observable truths that make it what it is.
Here's the history of Gravitational theory:http://en.wikipedia.org/wiki/History_of_gravitational_theory
This is more in the layman's terms.http://thehappyscientist.com/science-experiment/gravity-theory-or-law
As for pesticides, I use organics, like BT. Neonics are destructive in my estimation. Chemicals have too much potential for abuse, like my new next door neighbor who blows Sevin dust all around, willy-nilly, to kill mosquitoes. When I got him to turn off his leaf blower, or whatever that machine was, and pointed to the hive of bees going on about their business 10 feet from where he was standing, he declared, "I didn't even know they were there!"