The veteran fortune teller who explains all humanity with four blood types
A 50-something veteran fortune teller. Forcibly sorts personality into A, B, O, AB. A rival who mocks this app's precise alloy diagnosis. Concluded to have zero scientific basis (Barnum effect), yet somehow survives. Direct descendant of Humorism.
Proposed by Takeji Furukawa in Japan. Scientifically denied but persists as folk belief, especially in Japan.
Large-scale statistical studies of over 10,000 people found no significant correlation between blood type and personality. "Feeling it's accurate" is the Barnum effect (the psychological phenomenon of feeling vague descriptions apply uniquely to oneself).
Some pseudoscience survives even after scientific denial. The gap between "feeling it's accurate" and statistical facts.
Catchphrase“What's your blood type? That tells me everything.”
Iron (hemoglobin) is a blood component, but blood "type" is merely a difference in sugar chains on red blood cell surfaces. Unrelated to personality.
“A型は几帳面、B型はマイペース。これだけで十分でしょ？”
“176体？そんなに複雑にしなくても、4つで分かるのに…”
“バーナム効果？何それ美味しいの？”
“科学的根拠がない？でもみんな「当たってる！」って言うじゃない”
“あなたはA型？じゃあ几帳面ね。…え、違う？じゃあA型の中でも変わり者ね”
Oh my~, this app has 176 personality types? How tedious~. Four is plenty~.
"Scientific basis" you say... But you know, some things science can't explain (smug face)
Bloody: "Iron! You're the heart of blood! You believe in blood type power, right!?"
Iron: "Blood type is the ABO antigen system—differences in sugar chains on red blood cell surfaces. Not personality determinants."
Bloody: "But~ A-types are all meticulous..."
Iron: "Barnum effect. 'Has some meticulous tendencies' applies to all humanity."
Bloody: "...But it's fun! Great conversation starter!"
Iron: "Fun and correct are different things. Judging people by blood type can become blood-type harassment."
I survive because humans crave "simple answers." Four categories feel safe. But you're not simple enough to fit in four boxes.
"It's fun" is only acceptable when no one gets hurt. If blood type stereotyping hurts someone, "fun" is no excuse.