Exercise 3.6 Discussion

$\def\i{\mathbf {i}}\def\ket#1{|{#1}\rangle}\def\bra#1{\langle{#1}|}\def\braket#1#2{\langle{#1}|{#2}\rangle}\mathbf{Exercise\ 3.6}$
If someone asks you whether the state $\ket{+}$ is entangled, what will you say?

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