A partial character table is a matrix that is the generalization of character table to include
the concept of partial characters.
If a partial character is encoded by the split $A \mid B$, where $A$ and $B$ are disjoint subsets
of our given collection of $n$ taxa, then we can represent this character by an array $C$ of length $n$
in which $C[j]=1$ if the $j$th taxon belongs to $A$, $C[j] = 0$ if the $j$th taxon belongs to $B$, and
$C[j] = x$ if the $j$th taxon is not present in either set.
