$C\left(P\right)$

$\neg C\left(N\right)$

$a_P$

${\lambda }_{PP}$

${\lambda }_{PN}$

$a_B$

${\lambda }_{BP}$

${\lambda }_{BN}$

$a_N$

${\lambda }_{NP}$

${\lambda }_{NN}$