Are manufacturer AC cables good enough?


I have two PS Audio AC3 and two Pangea AC 14 cables I don't use.  My thinking is that Ayre wouldn't supply cables that are inadequate for their components.  Is that thinking flawed?

db  
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Then again, given the inherent irrationality/contradictions of Darwinism, and how many people uncritically accept that despite it's being scientifically falsified (insofar as soft science can be),
 For some reason I'm not amazed. I assume you question gravity as well being only a theory or are you in the intelligent falling theory camp? 
The tweaky magic stuff allows you to share the experience of visiting your dealer to talk about your hobby.  It makes you happier, so you believe it works. This is a great marketing plan, because every time you visit the store, is a selling opportunity for new equipment..