addition [additions](act of adding) noun [UK: ə.ˈdɪʃ.n̩] [US: ə.ˈdɪʃ.n̩]Addition and subtraction are functions of mathematics. = L'addizione e la sottrazione sono funzioni matematiche.
contraddizionenoun {f}
contradiction [contradictions](act of contradicting) noun [UK: ˌkɒn.trə.ˈdɪk.ʃn̩] [US: ˌkɑːn.trə.ˈdɪk.ʃn̩]
contradiction in terms(expression in which components contradict one another) noun [UK: ˌkɒn.trə.ˈdɪk.ʃn̩ ɪn tɜːmz] [US: ˌkɑːn.trə.ˈdɪk.ʃn̩ ɪn ˈtɝːmz]