Last Updated：2025/11/21
(law) A test of criminal insanity by which it must be clearly proved that, at the time of committing the act, the party accused was labouring under such a defect of reason, from disease of the mind, as not to know the nature and quality of the act he was doing, or, if he did know it, that he did not know he was doing what was wrong
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McNaughton rules
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Source Word
McNaughton rules
Noun
plural
plural-only
(law)
A
test
of
criminal
insanity
by
which
"it
must
be
clearly
proved
that,
at
the
time
of
committing
the
act,
the
party
accused
was
labouring
under
such
a
defect
of
reason,
from
disease
of
the
mind,
as
not
to
know
the
nature
and
quality
of
the
act
he
was
doing,
or,
if
he
did
know
it,
that
he
did
not
know
he
was
doing
what
was
wrong".
Japanese Meaning
犯罪行為時に、心の病などによって自分の行為の性質やその違法性を理解できなかったことを明確に証明する必要がある、刑事責任能力の欠如を判断する基準。 / 精神障害による認知機能の欠如を評価し、被告が犯罪当時に行為の本質や違法性を認識できなかった場合に、刑事責任を問えないとする法理。
Sense（1）
(law)
A
test
of
criminal
insanity
by
which
"it
must
be
clearly
proved
that,
at
the
time
of
committing
the
act,
the
party
accused
was
labouring
under
such
a
defect
of
reason,
from
disease
of
the
mind,
as
not
to
know
the
nature
and
quality
of
the
act
he
was
doing,
or,
if
he
did
know
it,
that
he
did
not
know
he
was
doing
what
was
wrong".
