evidence: A post shared on Facebook credits author Kurt Vonnegut with saying, "Be soft. [...] Vonnegut was an American author best known for his satirical writing style. He wrote several novels that are considered classics, including "Slaughterhouse-Five" and "Cat’s Cradle." [...] Besides Hertweck, Julia Whitehead, founder and CEO of the Kurt Vonnegut Museum and Library, and the museum’s curator, Chris Lafave, also confirmed that Vonnegut did not pen this quote.