Last Updated：2022/12/24
There is no collapse until Wigner comes along, yet because different branches of the previous superposition have acted differently to bring about different branches of Wigner's friend, each branch of Wigner's friend is under the illusion of seeing a sharp state, and thus under an illusion of collapse.
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There
is
no
collapse
until
Wigner
comes
along,
yet
because
different
branches
of
the
previous
superposition
have
acted
differently
to
bring
about
different
branches
of
Wigner's
friend,
each
branch
of
Wigner's
friend
is
under
the
illusion
of
seeing
a
sharp
state,
and
thus
under
an
illusion
of
collapse.
