C16

Consider the opposite

Before settling on a conclusion, spend two minutes arguing against it.

When to use this: When checking yourself
Learning impact: Strong change
Learning evidence: Credible with caveats
Where you are with the topic: Building understanding
How often to use it: Worth repeating often

When to use it

You just reached a conclusion and feel sure before you have stress-tested it.
An exam or quiz is close and you want evidence, not a feeling of readiness.
You finished a practice set and need to know what actually failed in your reasoning.

What to ask AI

Type something like: “I've concluded [X] because [reasoning]. Before I commit: give me the two strongest reasons I might be wrong.”

Ask what evidence would change your mind, then try to find it.

Keep the decision yours after the opposite case.

How it helps

First conclusions feel finished because they arrived with a feeling of fit.

Consider-the-opposite spends a few minutes arguing against that conclusion on purpose.

It is a known debiasing move: you activate reasons you would otherwise ignore.

Sometimes you keep the conclusion. Sometimes you revise it. Either way you know why.

How to run it

Write your conclusion and the reasons you currently have.
Ask for the two strongest reasons you might be wrong.
Argue those reasons yourself for two minutes, do not dismiss them.
State what evidence would change your mind.
Update, keep, or narrow the conclusion explicitly.

Example exchange

You

I’ve concluded the study shows the drug works because the treatment group improved. Before I commit, strongest reason I might be wrong?

There’s no adequate control or placebo comparison in what you described. Why would improvement alone show the drug worked?

You

It wouldn’t. I need a randomised controlled comparison with pre-registered outcomes. Without that I should weaken to “suggestive, not shown.”

Write that weakened claim in one sentence.

Copyable prompt

I've concluded [X] because [reasoning]. Before I commit: give me the two
strongest reasons I might be wrong, and tell me what evidence would change my
mind. Do not decide for me, wait for my update.

The Tell

If this exercise has never changed your mind or narrowed a claim, either you are extraordinarily calibrated or you are dismissing the opposite too fast.

If the AI tells you what to conclude, you practised obedience, not checking.

Principle evidence

Strength of the underlying learning idea, not a claim about AI products.

The underlying learning idea is rated moderate. Consider-the-opposite is a studied debiasing and judgment technique: generating contrary reasons can reduce overconfidence and fixation on a first answer.

AI delivery evidence

Whether an AI tutor delivers this method well is a separate question.

AI-suggested contrary reasons may be generic. You still have to engage them. Delivery is speculative.