adjective
indubitable
in-DOO-bi-tuh-bul/ɪnˈduːbɪtəbl/
Impossible to doubt or question.
The runner's victory is indubitable as all the others remain far behind.

Etymology
The negative prefix rules out the possibility of doubting: something indubitable is not merely undoubted in practice, but too plain to admit of doubt.
In context
some knowledge such as the knowledge of the existence of our sense data appears quite indubitable however calmly and thoroughly we reflect upon it
More examples
- Her talent is indubitable, even if you dislike her music.
- The video offers indubitable evidence that he crossed the finish line first.
- We need to separate indubitable facts from untested assumptions.
Forms
indubitable
indubitably adverb — In a way that excludes doubt.
Similar words
- undeniable
- Often describes something too obvious or evident to deny.
- incontrovertible
- Emphasizes evidence or arguments that cannot be successfully challenged.