The heart of a leftist/Last time

[Brad De Long]

>Michael Perelman wrote:
>
>>Justin.  Wonderful joke.
>
>Justin - <JKSCHW at aol.com> - signed off, saying he could no longer 
>have a rational discussion with his interlocutors.
>
>Doug

I don't understand. Just why is that a reason to sign off?

Brad DeLong