However, such situations are the exception rather than the rule.

There are few exceptions to this rule.

It follows that any itinerary that obeys these four rules corresponds to a point in $B$.


[see also: exclude, preclude]

The possibility $A= B$ is ruled out in the same way.

Its role is to rule out having two or more consecutive $P$-moves (on the grounds that they can be performed in one go).

Go to the list of words starting with: a b c d e f g h i j k l m n o p q r s t u v w y z