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<p>that put forward an understanding of heat transfer in terms of the movement of <a href="page.php?w=caloric_fluid">caloric fluid</a> was eliminated when a theory of heat as energy replaced it. Also, the theory that <a href="page.php?w=phlogiston">phlogiston</a> is a substance released from burning and rusting material was eliminated with the new understanding of the reactivity of oxygen.</p>

<p><big>Versus theorems</big></p>
<p>Theories are distinct from <a href="page.php?w=theorem">theorem</a>s. A theorem is <a href="page.php?w=formal_proof">derived</a> deductively</p><p>
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