Not only optional
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“Very intelligent and funny podcast; you always learn something you didn't know”
Benny3.14 via Apple Podcasts ·
Sweden ·
10/14/16
More reviews of Completely Optional Knowledge
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“I have fallen in love with Completely Optional Knowledge.”
Mica Charlotte via Apple Podcasts ·
United States of America ·
05/13/16
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“I love this show so much! There is humor and knowledge. People also ask weird question which is great! Please keep it up!”
Kuechi pilipino via Apple Podcasts ·
United States of America ·
11/05/16
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“Short, fun podcast with enjoyable questions and answers. Its great to explore things in science that I never thought to ask.”
HowardH via Apple Podcasts ·
United States of America ·
04/30/17
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