Who said "This is doable."?

This quote is attributed to Mark Watney.

This is doable. - Mark Watney

"This is doable."

Mark Watney

Character in The Martian

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"I'm going to have to science the shit out of this (paraphrased)"

"Humans are really resilient - we adapt quickly to circumstances"

"The key to survival is solving problems one at a time"

"Humor and maintaining perspective are essential to survival"