Who said "I think I'm depressed."?

This quote is attributed to Marvin the Paranoid Android.

I think I'm depressed. - Marvin the Paranoid Android

"I think I'm depressed."

Marvin the Paranoid Android

Character in The Hitchhiker's Guide to the Galaxy

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"I am at a considerable disadvantage. I am, after all, only a simple robot."

"Life, don't talk to me about life."

"I've been talking to the ship's computer. It hates me."

"I think you ought to know I'm feeling very depressed."