Originally, Norbert Weiner defined it as the study of "Control and communications in animal and machine." Nowadays, it's usually defined as the study of regulatory systems.
it means they would not care if someone was as mean to you as mean as they were to you. sometimes it means they do and its just that they are too insecure to tell the truth and use childish anticks...
well it depends its actually the way he acts to you for example is he is playing around with you stuffs like that that means he like you .hope this works !
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