In a refutable manner; so as to be refuted or disproved.
The Century Dictionary (Public Domain)
Use "refutably" in a sentence
"Israel is refutably invalidating her "unification" claims by unmercifully "dividing" the city with a concrete barrier, condemned by Palestinians as "the Apartheid Wall," which is expected to be finished by early next year."
"It's not as if a "democracy" is at risk of being saved here. 25% of the populace at best are believed to support Karzai's refutably legitimate US backed government which was returned to power with up to a 1/3 votes rigged."