We propose the Kochen-Specker theorem that relies on the properties of the Kronecker delta. We introduce the following value Sigma l=1mrl(<sigma z >)=0. The notation r(l)(<sigma(z)>) means the lth hidden outcome of quantum measurements when we would measure the expected value <sigma(z)> =0 in a thoughtful experiment. Surprisingly, we cannot define the value as zero when we accept the Kronecker delta. We cannot determine the hidden results for the expected value.