DIR xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
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       xkcd - A Webcomic - Immune System (1907)
        
       Image:
       immune_system.png
        
       It also helps with negotiation. "Look, if it were up to me, *I'd*
       accept your offer, but my swarm of autonomous killer cells
       literally can't be reasoned with. It's out of my hands!"
        
       Comics reproduced from www.xkcd.com under license.
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