presumptively

/prɪˈzʌmptɪvli/
adverb
  1. In a way that is based on what is likely or assumed to be true, often until proven otherwise.
    • Any person found at the scene is presumptively considered a witness.
    • The package was presumptively delivered yesterday, though no one signed for it.
    • The new drug is presumptively safe based on early trials, but more testing is needed.
Antonyms
What does "presumptively" mean? | whatsthatwordmean | whatsthatwordmean