Yes's or No's?

A young person (I assume) writes on a Chris McCandless blog:
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Imagine, opening your eyes to discover the vas[t], unseen wilderness. Waking up in a place without any yes’s or no’s, only you and your surroundings, hearing nothing but the sweet sound of Mother Nature.
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--Lance Wood
http://www.christophermccandless.info/lance-wood.html


Maybe Mr. Wood means no arbitrary yes's or no's, but I suspect he has a naive view of the wilderness as something like a vacation resort, with regular meals, no mosquitoes, and an infirmary stocked with antibiotics. The wilderness is one place where there are absolute yes's and no's. If you disobey them, you get hurt or die.