It's not a meme, it's a trivially verifiable fact. Gather a bunch of people, start poking at and hacking away their body parts, and you'll quickly discover there's a specific part that's the seat of thoughts and consciousness.
Or, if IRB doesn't approve of this study, just observe that medical practice around the world provides overwhelming empirical evidence for it every day, day in, day out. Now that we can swap almost every body part between people, it's kind of obvious which one is the one that's doing the thinking.
As much as your scientism and medical specialists may try to suppress evidence to the contrary, bodies are organic systems that amount to more than the sum of parts. And we cannot hack away at a body without disrupting its integrity--have you heard of "phantom limb syndrome"?
Or, if IRB doesn't approve of this study, just observe that medical practice around the world provides overwhelming empirical evidence for it every day, day in, day out. Now that we can swap almost every body part between people, it's kind of obvious which one is the one that's doing the thinking.