Ralph and Bob were in the locker room of the country club

"I'm sure hated to hear about disappearance of the professor",said Ralph.
"So did I,"replied Bob.

I always admired him because he was such a profound thinker..
"That true,"answered Ralph. 

"He was thinking no matter where he was. I remember the last time I saw him,"added Bob. "We were swimming in the lake, and suddenly he called out, I'm thinking! I'm thinking!!"

"You dummy!" roared Ralph. Didn't you know the professor lisped??"