Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum mechanical rules for observed observers and the consistency of
  quantum theory   I argue that the usual rules of quantum mechanics on measurement outcomes
have to be complemented with (or rather, understood to include) the condition
that observers who are themselves going to be subject to measurements in a
linear combination of macroscopic states cannot make reliable predictions on
the results of experiments performed after such measurements. Quantum
mechanical rules completed with this condition lift the paradox identified by
Frauchiger and Renner and become fully consistent.

22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex