to my knowledge
AFAIU
AFAIC
draw it fine
knaa
out and away
punt
for that matter
knowingly
quoad hoc
insofar
to the top of one's bent
inasfar as
all very well
get
peristomium
take a stab at
take a guess
while
donchaknow
knowhatimean
sivatherine
stab in the dark
no idea
iunno
hint
Scooby-Doo
by a long chalk
dig
acquainted
as much as possible
gauge
approximate
scraper
bittily
yesterday
sie
construe
to all appearances
haut-pas
within an inch of one's life
idiotism
have the foggiest
exactify
poinding
ostensorio
tarmac
peag
exiguously
cashier
retex
quadruple
extracranially
instantly
psalterium
silage
nonfamiliar
metagrobolize
priapic
countertomy
you ask me, I ask who
think
you tell me
your guess is as good as mine
simmeringly
search me
qasgiq
halpace
uh-oh, Spaghetti-O
don't ask me
go out on a limb
qargi
beats me
namaste
thus far
elusive
pokily
mesic
yunno
on the face of it
scious
don't I know it
incongruently
bedsitter
scammonin
unfamiliarly
loan
stiff
garden house
gnomesayin
moxie
worlds
DK
jetson
to the nth degree
inasfar
as much as
presentient