Why aren’t clonally transmissible rumors ubiquitous? If they occur by nose contact in Tasmanian devils, why not by skin contact in most animals (including humans)? https://en.m.wikipedia.org/wiki/Clonally_transmissible_cancer …
2) Very unlikely to have opportunities for transmission, particularly non-skin cancer, thus no pressure to be transmissible. cf. the surgeon who caught a patient's cancer via an errant scalpel.
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. Banned in Sweden. SubGenius, Zhuangist, white-hat troll. Defrocked mathematician. Brain problems.