undocumentable
unevidenced
the plural of anecdote is not data
evidenceless
evidencelessness
unsupported
inadmissible
uncorroborated
unsubstantiated
abstract
unconvincing
noncredible
unattested
inveracity
noncorroborative
uncorroborative
underexposure
flimsy
nonevidence
unfactual
more cry than wool
unproof
sourcelessness
fabulous
soft
unproofed
unprovenanced
bald
unverifiable
unobjective
ill-founded
nonconclusive
unprovenly
incompatible
discrepant
paradiplomatic
proofless
tell against
noncredibility
underpublicized
prooflessly
uncredible
smoking gun
factless
nonproven
undocumentary
unconvinceable
nonfacticity
unvindicable
insubstantiable