I feel we may both be pushing on the same open door.<p>&gt;&gt; I&#x27;m just pointing out that input is distinct from output; they&#x27;re not the same thing.<p>&gt; That&#x27;s obviously true, but that&#x27;s a very different statement than the one you originally made, namely, &quot;Everything you will ever experience is all in your head.&quot;<p>Nope, it&#x27;s exactly the same. Experience is output, and entirely in your head. Sledgehammers to the body are input. Everything you will ever experience is entirely output. Sledgehammers will influence that output, but input and output are not the same. They are tightly coupled, and one of course strongly influences the other.<p>I agree with you that these are salient and important distinctions. I simply disagreed with your assertion that &quot;It (experience) is <i>not</i> all in your head.&quot; It really <i>is</i>. After all, where else would <i>your experience</i> be?<p>Okay enough splitting hairs. Personally I feel the distinction is clear and highly relevant. Some references I should have provided earlier:<p>Melzack, 2001. Pain and the neuromatrix in the brain: <a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;11780656" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;11780656</a><p>Moseley, 2003. A pain neuromatrix approach to patients with chronic pain. <a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;12909433" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;12909433</a><p><a href="http:&#x2F;&#x2F;www.bodyinmind.org&#x2F;resources&#x2F;journal-articles&#x2F;full-text-articles&#x2F;reconceptualising-pain-according-to-modern-pain-science&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.bodyinmind.org&#x2F;resources&#x2F;journal-articles&#x2F;full-te...</a><p>(Edits: clarity and detail)