illogical
adjective
[ ɪˈlɒdʒɪk(ə)l ]
• lacking sense or clear, sound reasoning.
• "an illogical fear of the supernatural"
Similar:
irrational,
unreasonable,
unsound,
unreasoned,
unfounded,
groundless,
unjustifiable,
unjustified,
incorrect,
erroneous,
wrong,
invalid,
spurious,
faulty,
flawed,
fallacious,
unscientific,
inconsistent,
unproved,
specious,
sophistic,
casuistic,
absurd,
preposterous,
untenable,
implausible,
impossible,
beyond belief,
senseless,
meaningless,
nonsensical,
insane,
ridiculous,
idiotic,
stupid,
foolish,
silly,
inane,
imbecilic,
crazy,
off beam,
way out,
full of holes,
daft,
barmy,
backasswards,