Don't confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.
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“I know a lot of people who are very good at their craft who have learned - people behind the camera - who really have a lot to offer because they know what they're doing, they know what to do, they've made their mistakes.”
“In time of war steamships and improved arms are the most important things.”