I saw this photo being used in a presentation by Julia Galef called "How to Change Your Mind", and I wondered if I could illustrate something to the more stubborn minded.
Most of us, critical thinkers and otherwise, most likely first saw this image of two raccoons on a slope and for the first moment, thought that what you saw above the racoons was the sky. Then, maybe a second or two later, a red flag went off when you saw what appeared to be a floating rock. Once you were able to understand that the rock was, in fact, not levitating, but rather partially submerged in the reflective water, you began to notice many more minor clues that indicated you were looking at water. Going back, you can now notice the ripples of water in the reflections of the clouds and the slight gradient between land and water at the shoreline. You are also able to ultimately determine that the raccoons are facing uphill, not down.
What's important to realize is that the image didn't change. Our presupposition is that when we see a blue background dominating the upper area of a photo or painting, that is would be sky. Once we discover a key indicator, we begin to research further. The more details we discover, the more certain we become of the truth.
When science changes it's understanding, this is what's happening on a larger scale. With the more evidence that is gathered and observed, the more accurate a theory becomes. Part of the success of science depends on a desire to be mistaken as well as the desire to know things.
The knowledge you've accumulated by looking at the image above built a theory, in a way. Scientific theory is merely an explanation of known information, accumulated though evidence, observation, and testing.
Just about everyone of you, upon seeing this photo, progressed rapidly through the scientific method.
Those with strong religious convictions to the contrary would be represented as those who insist the blue in the photo is not a reflection in the water and that the rock is actually levitating... or perhaps a more fitting analogy would be that they simply choose to pretend the rock isn't even in the picture. "Rock? What rock? You still haven't shown me that rock! The water is a satanic lie! We are clearly looking at sky because sky is blue and water is clear."