Page 185

Location: Chapter 19, Appendix

It is (fifth line of the Appendix)

... if it is built up from the letters \(B\), \(C\), \(S\), \(T\) and variables.

It should become

... if it is built up from the letters \(B\), \(C\), \(S\), \(I\) and variables.

Short explanation

Here, the presence of a \(T\) where an \(I\) is expected is clearly a typo.