e way of specifying that L is preserved in the transition
from the triple &lt;C, A, B&gt; to the triple &lt;C, B, B'&gt;.  People will often think
that this makes semiosis (the sign process) necessarily an infinite progress,
but this is a mistake, as nothing in this definition of a sign relation says
that an interpretant sign must be distinct from the initial sign of a triple.

|                               A (sign)
|                              / \
|                             /   \
|                  