&gt; &quot;The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.&quot; - F. Scott Fitzgerald<p>Opposed ideas does not always mean that both ideas have the same level of validity.<p>Some ideas are provably wrong.  &quot;Depolarizing&quot; allowed climate change denial and anti-vaxxers, for example, to gain a following because we didn&#x27;t stamp them out quickly and strongly.