Why AI Won't Replace Teachers — A Response
A friendly disagreement with a popular video. The conclusion (teachers shouldn't be replaced) is right. The argument (AI can't do what teachers do) is the wrong way to defend it — and is going to keep losing. Here's the argument that actually survives the next iteration of the technology.
15 min readThe video this piece responds to. Worth watching first — it makes the standard case, which is also the case I think we should stop making.
I want to start where every honest response should: on the part the source video gets right. AI should not replace teachers. The conclusion is correct. I would defend it. I would defend it harder than the video does, in fact, because the way the video defends it is going to keep losing.
The argument in the video runs on capability claims. AI is only adaptive, not really personalized. AI cannot really collaborate, only simulate it. AI cannot really build relationships, only mimic them. AI cannot really care. Each of these claims has, even since the video was filmed, become less true. Some of them have become a lot less true. The capability gap that felt obvious in 2024 has narrowed in 2025, and there is no available reason to think the trend reverses in 2026.
This matters not because the conclusion is wrong but because the argument for it is wearing out. If we keep grounding our defense of human teachers in claims about what AI cannot do, we will lose the defense one capability at a time. The defense that survives is a different shape. It does not say AI cannot teach. It says, with Hume, that even if it can, that does not yet tell us whether it should.

The Digital Doppelgänger
You are Mr. Torres, an AP Literature teacher at a suburban high school. It's September 2026. Over the course of one semester, you will confront a question that no generation of educators has ever faced:
When a student's AI agent — indistinguishable from the student themselves — attends class, participates, and learns... who was educated?
This experiment unfolds across five acts. Your choices at each stage will cascade into the next. There are no resets between acts — just as there are none in a real semester.
The reason this scenario is uncomfortable is that the discomfort isn't reducible to a capability claim. The student in the scenario got the qualification. The AI passed the tests. The friction is somewhere else — in the substitution of what was supposed to happen to the student for a measurement of what was supposed to come out the other end. The same friction, in a slightly less concentrated form, is what the wider AI-replacing-teachers conversation is about.
For Educators
Take this somewhere. The three sections below distill what to remember, what to do with students next week, and where to keep reading.
Key Takeaways
Stop arguing capability. The 'AI can't really X' line keeps falling, and each fall weakens the case for the conclusion (don't replace teachers) it was supposed to be defending.
The argument that survives is values-based and is/ought-shaped: even if AI can do this, doing it this way is not the same act, and we collectively value the original.
Biesta's three purposes give a workable map of what teachers actually do. AI handles qualification well, socialization unevenly, subjectification not at all. The substitution would be uneven across the three.
Sparrow and Flenady's 'money talks' point matters. The values argument needs to be documented before the budget conversation, not improvised during it.
Hubris is the wrong charge to defend against. Concede that the machine may keep gaining capability. Make the case that schools are for something that doesn't depend on machines lacking capability.
Bring It Into Your Classroom
Watch and respond
75 minWatch the source video as a department. Then read the argument here. As a group, write a single paragraph that states your school's actual position on AI and teachers, framed in values rather than capability terms. Stress-test it against a hostile parent and a hostile colleague.
Discussion prompt: If a board member asked what your school is for that AI is not, would the paragraph answer? If not, what's missing — the value, the framework, the test case, or the willingness to defend the tradeoff in public?
Run the Doppelgänger scenario with staff
60 minUse the embedded thought experiment above as the PD trigger. Have staff work through it individually first, then compare answers. The disagreements between answers are the surface of disagreements about what the school is for.
Discussion prompt: If two teachers would handle the Doppelgänger case differently, what is the underlying value disagreement and which framework would help you surface it?
The 'concede the capability' exercise
30 minPull a recent presentation, parent letter, or policy memo in which the school defended human teachers on capability grounds ('AI can't really mentor,' 'AI can't really care,' etc.). Rewrite the relevant paragraph in values terms.
Discussion prompt: After the rewrite, is the defense stronger or weaker? If weaker, is it weaker because the original was overclaiming, or because the school hasn't done the values work yet?
Where to Go Next
Sparrow & Flenady on automated education (AI & Society, 2025)
The is/ought distinction at its sharpest, applied directly to teacher replacement. Read this.
Shannon Vallor, The AI Mirror (2024)
On AI as reflective surface rather than understanding partner. Important for the 'simulated empathy' question.
Coelho et al., BERJ (2025)
The placebo/nocebo argument made carefully. Worth assigning to any committee considering AI-tutor pilots.
Continue Exploring
The Paradox of AI
The deeper version of this argument
Ambiguity to Action
The frameworks underneath
Authorship Quandary
The case-level companion piece
