"""Random math utils."""defis_kronecker_delta(vector):"""Returns True if vector is a kronecker delta vector, False otherwise. Specific evidence ('YES' or 'NO') is a kronecker delta vector, whereas virtual evidence ('MAYBE') is not. """count=0forxinvector:ifx==1:count+=1elifx!=0:returnFalseifcount==1:returnTrueelse:returnFalse