by Ninja » Tue May 16, 2017 6:59 pm
A cloud is partly defined by being in the sky. It wouldn't be one if it wasn't. Here's the definition of 'cloud' that you can get from a quick Google search: "a visible mass of condensed water vapor floating in the atmosphere, typically high above the ground."
Something is self-evident when it is inherently perceivable by usage of one's senses and logic. Circular reasoning is a logical fallacy in which the person that is reasoning begins their line of thought with what they are trying to prove. Definitions do not need to be proven; they are simply the statements derived by logically using self-evident truths to form sentences which aid humans in communication and explanation of concepts.
One can only state that something is self-evident by correctly using one's cognitive and logical abilities. Circular reasoning is one result of a specific misuse of the aforementioned abilities.
"Grammar is the logic of speech, even as logic is the grammar of reason." ~ Richard Chenevix Trench
"You don't have good grammar when you type with your fists." ~ C. F. Payne