No.... epistemology is not an illogical but convincing argument.
e-pis-te-mol-o-gy (i-pist-mol-je)n. The branch of philosophy that studies the nature of knowledge, its presuppositions and foundations, and its extent and validity.
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Excerpted from American Heritage Talking Dictionary
Copyright © 1997 The Learning Company, Inc. All Rights Reserved.
soph-is-try (sofi-stre)n.pl. soph-is-tries. 1. Plausible but fallacious argumentation. 2. A plausible but misleading or fallacious argument.
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Excerpted from American Heritage Talking Dictionary
Copyright © 1997 The Learning Company, Inc. All Rights Reserved.
You can use sophistry when arguing about epistemology but they are not the same nor are they similar.