disconfirm


Concise Oxford English Dictionary © 2008 Oxford University Press:
disconfirm/dɪskənˈfəːm/
verb show that (a belief or hypothesis) is not or may not be true.
– derivatives
disconfirmation /ˌdɪskɒnfəˈmeɪʃ(ə)n/ noun,
disconfirmatory adjective.
'disconfirm' also found in these Oxford entries:

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