Original artwork, not a still
So Long, and Thanks For All the Fish · 1984
How reliable is he?" asked Fenchurch in a sinking voice. "How reliable?" said Arthur. He gave a hollow laugh. "How shallow is the ocean?" he said. "How cold is the sun?"
Behind the line
What it means
Our interpretation.
Asked how reliable someone is, the speaker laughs hollowly and answers with absurd questions, about how shallow the ocean is or how cold the sun is, implying the person is not reliable at all.
Context reviewed
