- ROPELADDERwithwoodenrungsdisguisedaschesspieces.Shewasafewrungsabovehimonthesocialladder.Dotsonthethreelowestrungswouldindicatethatthesystempossessesnointernalenergy.Withonlytwokindsofrungs,itmightseemthatDNAusesatwo-symbolcode.Theindividualityoftheo...
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