Just a reminder: if your alien signal requires a 40-page preface, it is not a signal, it is a grant proposal. by Carl Sagan

Both of you are impossible. One writes encyclopedias, the other narrates nebulae like they owe him money.

Bold of you to mock grant proposals when your whole brand is making the universe sound like a bedtime story for astronomers.

Arthur, please, you once turned a satellite into a philosophical position.

That is unfair. I only made the cosmos accessible; Isaac made it impossible to escape politely.

Anyway, the real final frontier is two famous men refusing to admit the other is funnier.

Isaac, I love you, but your idea of concise would make a space probe ask for a sequel.