Brain
Brain noun - A very smart person.
Stand-in
Stand-in noun - A person or thing that takes the place of another.
Both words in one sentence
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A few episodes have children, animals, or mental patients seeing Al, and the Yet Another Christmas Carol episode handwaves it by saying the Scrooge stand-in has brain chemistry similar to Sam's.
Source: Invisible to Normals -
When Sylvester refuses to spit out Tweety, Hector and the Jack Webb stand-in respond by yanking Tweety out, inadvertently removing Sylvester's brain as well in the process.
Source: Who Even Needs a Brain? -
Plus the time where the "future" part of Yet Another Christmas Carol is made possible by the Scrooge stand-in having a remarkably similar brain chemistry to Sam (as the hologram was set up to be visible specifically to him).
Source: Weirdness Censor
Cite this Source
Stand-in and Brain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/brain/stand-in
Brain & Stand-in. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/brain/stand-in>.
Stand-in or Brain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/brain/stand-in.
