not that I know of
I don't suppose
rhetorical question
who cares
yeah, no
doubtingly
doubtfully
no means no
who knows
non constat
don't-know
how should I know
if anything
me neither
no
plead the Fifth
dubitative
nope
but hey
so what
erotesis
nonanswer
aporetic
aporetical
that's for me to know and you to find out
as if
I don't understand
mixed signal
I have a question
huh
do not want
unsubstantiate
well
equivocator
too
suspensory
fudge
tergiversator
hedger
nonreply
responselessness
unrepliable
doubting
nonresponse
ask me one on sport
I'm confused
guess
blur
yes and no
pretend
hazard
O ye of little faith
conversation stopper
it is and it isn't
unclarity
venture
stopper
nonanswerable
a dumb priest never got a parish
hardly
guess what
no clue
barely
dubiously
scarce
scarcely
nosuh
unh-uh
alleged
I just work here
unreplied
negatively
mump
pray tell
yes way
don't quote me
confusion
none of your beeswax
unclearly
heroic assumption
answerlessness
umlessness
go fish
you wish
I'm worried
what someone said
dull
vacuity
questioningly
twithought
umbrage
redoubt
contradictingly
ambiguously
unsurely
I'm scared
hay is for horses
if I may be so bold