ks. 

HC: I have my serious doubts that we actually need the concept of teridentity for 
    logical purposes generally. The cross-reference and possible cross-reference 
    of the variables seems to take the place of teridentity as things are usually 
    formulated.

HC: If you can clarify this matter, then I think you will
    provide a benefit to readers of the list, myself included.

Howard, Ken, &amp; All,

I apparently failed to receive this earlier message from Howard.
I will put Burch's book on my