To spell out the impredicability or predicability of the term "impredicable" :
First alternative : While we can say ' impredicable is impredicable ', we cannot say : ' the term or concept of "impredicable" is (itself) impredicable '.
Second alternative : While we can say ' impredicable is impredicable ', we also can say : ' the term or concept of "impredicable" is (itself) impredicable '.
About these alternatives :
If we can legitimately say
the term or concept of "impredicable" is impredicable,
then it must be "predicable".
If, on the other hand, we can legitimately say
the term or concept of "impredicable" is predicable,
then it must be "impredicable".