Continued from this thread jack... What is a theory? According to Merriam-Webster it is: For the sake of today's discussion let's look at the last two. 5 : a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena <the wave theory of light> 6 a : a hypothesis assumed for the sake of argument or investigation b : an unproved assumption : conjecture c : a body of theorems presenting a concise systematic view of a subject <theory of equations> I'm sure many of you can agree on this. But what is an acceptable general principle? Is there one? Let's check out a little thing called demarcation... Okay so we can conclude that true theory based on a general principle can be hard to come by, right? However, most of us can agree on the Scientific Method... what is that? Let's try this out real quick on something most of us can agree on... Do some birds eat bird seed? From research it seems some birds do eat small seeds. I bet if I put out birdseed, some birds will eat it. I set out bird seed to see if they will eat it. It was seen that some birds did eat the bird seed Birds were seen eating the bird seed that I set out. My conclusion is some birds eat bird seed. This a fairly simple and rather hard to argue example of the Scientific Method. If everything was this easy then of course it would show that it holds true. Now let's try something a little more difficult. I see an ant on my counter. Why is this ant here? Ant's like food. Sometimes they hunt for it. The ant is looking for food. I set out a sugar cube to see if the ant takes it. The ant did not take it so the ant wasn't looking for food. I conclude the ant had another purpose. This can't be proven. Just because the ant did not take the sugar cube, does not mean it was not looking for food. This is an experimental fallacy. The same holds true about religion. "I have not seen God, therefore he does not exist." This cannot be proven or disproven. So does that mean this is not science? One would argue that God is the basis for all science, without Him we would not exist. Others would argue that science itself disproves God because he cannot be proven via the Scientific Method. This is the point of demarcation. The short conclusion to this is that, yes some science is based on opinion. My opinion is that God does exist and some others is that He doesn't. Let's take something else. There is a lot of proof for Darwin's theory of evolution in the creation of humans, and a lot of evidence against it. Both are theories. An opinion must come to rest for someone to take either side. Why is it an opinion? Because neither can be proven with 100% certainty.