incontrovertibly
adverb/ˌɪnkɒntrəˈvɜːtəbli/
/ˌɪnkɑːntrəˈvɜːrtəbli/
(formal)- in a way that cannot be disagreed with or denied synonym incontestably, indisputably
- Her book shows incontrovertibly that he was innocent.
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incontrovertibly