What you are saying in this is that this assertion has two distinct role
types "Opposite of White" and "Opposite of Black". Similarly my brother and
I are linked by two different role types "Brother of Ian" and "Brother of
Martin" It is the pair of the role type and the role player that needs to be
unique, not the role type itself. My conclusion is that the role type is not
a distinguishing property. It is simply a property that allows you to
identify sets of assertions that play a similar role in different assertion
instances. The RM should not concern itself about the fact that the same
role type occurs in different places. It should only concern itself with the
uniqueness of role type/player pairs in specific instances.

What you are saying in this is that this assertion has two distinct role
types "Opposite of White" and "Opposite of Black". Similarly my brother and
I are linked by two different role types "Brother of Ian" and "Brother of
Martin" It is the pair of the role type and the role player that needs to be
unique, not the role type itself. My conclusion is that the role type is not
a distinguishing property. It is simply a property that allows you to
identify sets of assertions that play a similar role in different assertion
instances. The RM should not concern itself about the fact that the same
role type occurs in different places. It should only concern itself with the
uniqueness of role type/player pairs in specific instances.

What you are saying in this is that this assertion has two distinct role
types "Opposite of White" and "Opposite of Black". Similarly my brother and
I are linked by two different role types "Brother of Ian" and "Brother of
Martin" It is the pair of the role type and the role player that needs to be
unique, not the role type itself. My conclusion is that the role type is not
a distinguishing property. It is simply a property that allows you to
identify sets of assertions that play a similar role in different assertion
instances. The RM should not concern itself about the fact that the same
role type occurs in different places. It should only concern itself with the
uniqueness of role type/player pairs in specific instances.

What you are saying in this is that this assertion has two distinct role
types "Opposite of White" and "Opposite of Black". Similarly my brother and
I are linked by two different role types "Brother of Ian" and "Brother of
Martin" It is the pair of the role type and the role player that needs to be
unique, not the role type itself. My conclusion is that the role type is not
a distinguishing property. It is simply a property that allows you to
identify sets of assertions that play a similar role in different assertion
instances. The RM should not concern itself about the fact that the same
role type occurs in different places. It should only concern itself with the
uniqueness of role type/player pairs in specific instances.

What you are saying in this is that this assertion has two distinct role
types "Opposite of White" and "Opposite of Black". Similarly my brother and
I are linked by two different role types "Brother of Ian" and "Brother of
Martin" It is the pair of the role type and the role player that needs to be
unique, not the role type itself. My conclusion is that the role type is not
a distinguishing property. It is simply a property that allows you to
identify sets of assertions that play a similar role in different assertion
instances. The RM should not concern itself about the fact that the same
role type occurs in different places. It should only concern itself with the
uniqueness of role type/player pairs in specific instances.

What you are saying in this is that this assertion has two distinct role
types "Opposite of White" and "Opposite of Black". Similarly my brother and
I are linked by two different role types "Brother of Ian" and "Brother of
Martin" It is the pair of the role type and the role player that needs to be
unique, not the role type itself. My conclusion is that the role type is not
a distinguishing property. It is simply a property that allows you to
identify sets of assertions that play a similar role in different assertion
instances. The RM should not concern itself about the fact that the same
role type occurs in different places. It should only concern itself with the
uniqueness of role type/player pairs in specific instances.