slicker
trickster
cheat
cheater
beguiler
deceiver
true believer
skeptic
errorist
delusionist
flat-earther
avower
affirmer
asseverator
declarer
asserter
Nicodemite
infidel
miscreant
misbeliever
nonbeliever
heretic
keep telling yourself that
creditor
leg-pulling
apistevist
leg-pull
pseudologist
crypto-believer
hypocrite
dissimulator
phoney
pretender
deceptive
lead astray
phony
dissembler
delusory
take someone at their word
believer
truthseeker
doubting Thomas
credulity
disbeliever
convincing
nihilist
deluder
attester
attestant
pass as
Homoean
mythoclast
confessionist
denier
string along
Cassandra
pragmatist
reclaimant
pronatalist
truthteller
leap of faith
dreamer
prebeliever
guilt complex
irrationalist
incredulity
betray
nonaccepter
deceive
infernalist
monoletheist
proclaimant
take someone's word for it
sentiocentrist
unbelievably
antisceptic
denying
dog in the manger
reversionist
sceptic
nonsense
lebai
doubter
sham
dissemble
misdescriber
feign
pretend
delude
affect