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Unsubstantiated
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groundless
inconclusive
indecisive
not following
not proved
unascertained
unattested
unauthenticated
uncertified
unconfirmed
uncorroborated
undemonstrated
undetermined
unestablished
unfixed
unfounded
unproved
unproven
unsettled
unshown
unsupported
unsupported by evidence
unsustained
untested
untried
unvalidated
unverified
without basis
without grounds
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