Peanuts by Charles Schulz for August 21, 1961
Transcript:
Linus straes at the television and says, "Speak up! Tell him! Refute his arguments!"<BR><BR> Linus says, "Show him where he's wrong! Use quotations from Ratner, Olsen and Letness! Now use sarcasm! That's it!!"<BR><BR> Linus says, "Now you've got him! Use more sarcasm!! That's the way! Now You've really got him!"<BR><BR> Linus lies on the floor and says, "Whew! These panel discussions on art wear me out!"<BR><BR>
This strip was an enigma to me for decades until I came across this blog:
https://marcrescue.wordpress.com/2010/02/08/a-new-year-and-sighhh-still-a-geek-atleast-about-peanuts/
The Ratner, Olsen, and Letness mentioned refer to Dave Ratner, Paul Olsen and George Letness, artist friends of Charles Schulz, and the strip was a private joke between them. The Marc Ratner who runs that blog appears to be the son of Dave Ratner.