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ar‧gu‧a‧ble

1 not certain, or not definitely true or correct, and therefore easy to doubt [= debatable]:
Whether or not Webb is the best person for the job is arguable.
Whether or not Webb is the best person for the job is arguable.2 used in order to give good reasons why something might be true :
It's arguable that the legislation has had little effect on young people's behaviour.
it is arguable that
It's arguable that the legislation has had little effect on young people's behaviour.