premise: a bird is a kind of thing sent2: hiding can be used to avoid something sent3: some leaves have a speckled brown color sent4: difficult to distinguish can mean difficult to see in something else sent5: some birds have a speckled brown color sent6: camouflage is used for hiding by animals from predators sent7: things that looks like other things are difficult to distinguish from that other thing sent8: hiding means ability to be seen decreases for camouflage.
hypothesis: planets in the solar system orbit the sun in an elliptical orbit