Epicurus
... that the ancient Greek philosopher Epicurus taught that the only reliable way to learn about the world is through empirical observation?
... that the ancient Greek philosopher <b id="mw3w"><a href="./Epicurus" id="mw4A" rel="mw:WikiLink" title="Epicurus">Epicurus</a></b> <i id="mw4Q">(bust pictured)</i> taught that the only reliable way to learn about the world is through <a href="./Empirical_research" id="mw4g" rel="mw:WikiLink" title="Empirical research">empirical observation</a>?