logic -- payoff(s) / challenge(s) / game(s) / math(s) / plan(s)

* _ .. -- @ media / idea(s) / change(s) / theme(s) ? [:/] _


education(s) question(s) moral(s) rethoric(s)


modus tollens -- law of contrapositive
$$ \frac{ P \to Q, \neg Q }{ \neg P } $$

with: P, Q / wiki / pattern(s) / reference(s) / trivium

norm(s) utopia rule(s) ethic(s) answer(s) failure(s)


* - play / social(s) / machine(s) / method(s) / cycle(s) # ! @ Æ