"Zippy" Cartoon Question: Encounter With JP Sartre?

I remember seeing a Zippy strip, where the famous pinhead encounters the late philosopher in the woods-what was the encounter about?

Um,

[sub]never mind, I always get Zippy and Ziggy confused…[/sub]

Griffy meets Jp Sartre in the woods in the strip of 3/15/98. They talk about being and nothingness (ok, they literally just say ‘being’ and ‘nothingness’).

And in a Zippy Christmas print, Zippy gives JP ‘nothingness’ for Christmas. He is disgusted by anything else ‘being’, apparently.’

Also, the Zippy website is searchable by keyword.