Want to Change Someone’s Mind? Don’t Start With “I Disagree”

Why effective persuasion begins with common ground—not contradiction

As a single father to my 15-year-old daughter, Ally, I have had to establish clear rules and boundaries from the time she was very young.

One of those rules concerned bedtime. Naturally, the appropriate bedtime changed as she grew older, but the principle remained the same: she needed to go to bed at a time that allowed her to get sufficient sleep.

Like most children, however, Ally never regarded the existence of a firm rule as sufficient reason to abandon all attempts at negotiation.

The bargaining might have looked something like this:

Child: Dad, can I stay up until 11—just for tonight?

Father: No, it’s bedtime. You’ve got school tomorrow, so come on—off to bed.

Child: No, I don’t want to go to bed yet. It’s too early.

Father: No, you’ve got to wake up early for school. Go to bed now.

Child: No! None of my friends go to bed this early. Why do I have to?

Notice what happens.

Almost every response begins with the word “no”.

The father rejects the child’s request. The child then rejects the father’s instruction. Each “no” invites another “no”, until an ordinary bedtime routine becomes a contest of wills.

The father may have excellent reasons for enforcing the rule. The child may even know that the rule is unlikely to change. But neither of them is now discussing sleep, school or what would be best for the following morning.

They are defending their respective positions.

It has become:

Me versus you.

But that is not generally how I handled these conversations with Ally.

Instead of immediately saying no, I would often say something like:

“I can see why you want to stay up. And you know what? I wish you could. I enjoy staying up and watching television with you too. But knowing what I know about the importance of sleep—and how harmful insufficient sleep can be to a developing brain—I couldn’t live with myself if I allowed you to stay up until 11.”

The answer was still no.

The rule had not changed. Ally was still going to bed.

But the basis of the conversation had changed completely.

I had acknowledged that her request was understandable. I had also established genuine common ground: I enjoyed spending that time with her and, in an ideal world, would have liked her to stay up too.

The problem was not that she wanted something and I wanted to deny it. Nor was it simply that she was challenging my authority by attempting to break one of my rules.

The problem was insufficient sleep and the effect it could have on her health, concentration and development. That was something neither of us wanted.

The conversation was no longer:

Me versus you.

It had become:

You and me versus the problem.

That does not guarantee that a child—or a teenager—will happily accept the decision and march off to bed. Persuasion is not magic.

But it removes an unnecessary source of resistance.

Ally no longer has to defend herself against a father who appears interested only in enforcing his authority. She can see that I understand what she wants, that part of me wants it too and that my decision is motivated by concern for her wellbeing rather than a desire to win a contest of wills.

Adults put up their guard too

This pattern is not limited to conversations between parents and children.

Adults do precisely the same thing in meetings, negotiations, political discussions and everyday conversations. The language may be more sophisticated, but the psychological pattern remains remarkably similar.

Someone presents an idea, and we respond:

“No.”

“You’re wrong.”

“I disagree with you.”

We may believe we are simply expressing a different opinion. The other person, however, may experience our words as a verbal punch.

Imagine standing opposite someone in a boxing ring.

The moment you throw a punch, what do they do?

They put up their guard.

When you begin with “I disagree with you”, you may be producing a similar response. Instead of examining your argument openly, the other person begins preparing to defend their own.

You have placed yourselves in opposite corners of the ring.

Worse still, telling someone “I disagree with you” gives them a reason to take the disagreement personally. You may intend to challenge an idea, but your language can make it sound as though you are challenging the person.

Once that happens, changing their position may feel less like reconsidering an issue and more like admitting defeat.

And once someone has put up their guard, persuasion becomes considerably more difficult.

What happens when our beliefs are challenged?

The brain does not literally “switch off” when somebody disagrees with us. The reality is more complicated—and more revealing.

Research involving people with strongly held political beliefs found that challenges to those beliefs engaged brain systems associated with identity, emotional processing and internally focused thought. This suggests that when an important belief is challenged, the experience may involve more than an objective assessment of evidence. The person’s sense of self can also become involved.

Another study examining face-to-face conversations found greater neural synchrony between participants when they agreed than when they disagreed. Agreement and disagreement produced distinctly different patterns of neural activity, with disagreement involving additional cognitive and emotional processes.

Research into consensus-building has also found that group discussion can increase neural alignment between participants, with stronger alignment associated with greater behavioural consensus.

None of this means that people become incapable of thinking when they encounter disagreement. Nor does it mean that we should conceal our position, avoid difficult conversations or pretend to agree when we do not.

It means that direct contradiction can change the way the other person processes the conversation.

Instead of becoming more receptive to our argument, they may become more committed to protecting their own.

If we genuinely want someone to consider our position, why begin by giving them something to defend?

Challenge the idea without challenging the person

Suppose a colleague proposes a new initiative that you believe will cost too much and take too long to implement.

You could say:

“I disagree with you. Your proposal is too expensive and will take too long.”

Your concerns may be completely valid. But your opening immediately creates two opposing sides: your judgement against theirs.

The other person is now likely to start thinking of reasons why the proposal is not too expensive, why the implementation time is justified and why you have failed to appreciate its benefits.

In other words, your first sentence has told them exactly what they need to defend.

Now compare that response with this:

“I agree that we need a solution that protects the quality of the service. My concern is whether this particular approach will allow us to do that without substantially increasing the cost and implementation time.”

The disagreement has not disappeared. The second speaker is no less honest, firm or committed to their position.

But the response begins with common ground: both people want to protect the quality of the service.

It then detaches the point of contention from the person. Instead of declaring that your proposal is wrong, the speaker places cost and implementation time at the centre of the conversation as issues that both parties need to examine.

The conversation can then move towards a shared question:

How can we protect quality without creating unacceptable costs or delays?

This is the fundamental shift on which effective persuasion depends:

Not me versus you. You and me versus the problem.

Put the problem at the centre

A persuasive communicator does not need to avoid disagreement. They need to structure it more intelligently.

This can be done through three verbal moves.

1. Establish genuine common ground

Begin by identifying the objective, concern or principle you genuinely share:

“We both want to protect the quality of the service.”

“I agree that we need to improve productivity.”

“You’re absolutely right that the present situation cannot continue.”

This must not be empty flattery. False agreement is usually transparent and may damage your credibility.

The objective is to remind the other person that, despite your different positions, you are not necessarily on opposing sides. You may already agree about the outcome and differ only on how best to achieve it.

2. Detach the problem from the person

Move the point of contention away from the individual and place it at the centre of the discussion:

“The issue we need to resolve is how we achieve that without making the service unaffordable.”

“The question is whether this approach will produce the improvement quickly enough.”

“My concern is the effect this may have on our existing customers.”

Notice what this language does.

It does not say, “You are wrong.” It identifies a cost, risk, consequence or unanswered question that deserves attention.

You are no longer attacking the person’s judgement. You are inviting them to look at the problem with you.

3. Invite joint examination

Once the problem has been placed at the centre, invite the other person to help examine it:

“Could we consider an alternative that might allow us to achieve both?”

“How could we reduce that risk while preserving the strengths of your proposal?”

“Would it be worth comparing the two options before making a final decision?”

This gives the other person room to reconsider their position without losing face.

They do not have to admit that you defeated their argument. They can participate in finding a stronger solution.

Common ground is not surrender

Some people fear that acknowledging any part of another person’s argument will weaken their own.

It does not.

Recognising a valid point demonstrates confidence, fairness and intellectual honesty. It shows that you are not arguing simply for the satisfaction of winning. You are interested in reaching the best possible conclusion.

A skilled influencer does not need to reject everything the other person says in order to introduce a different position.

They can say:

“I agree with the objective, but I have concerns about the method.”

“I understand why that option is attractive. We may also need to consider its longer-term consequences.”

“There is considerable merit in that proposal. The question is whether it adequately addresses the risk we identified earlier.”

You are not weakening your argument. You are presenting it in a form the other person can consider without first having to protect themselves.

Agreement lowers the guard.

Your argument can then get through.

Do you want to win—or persuade?

There is an important difference between proving someone wrong and changing their mind.

Proving someone wrong can become a contest. It creates a winner and a loser. When people feel that their intelligence, status or judgement is under attack, they may continue defending their position even when the opposing argument is stronger.

Persuasion has a different objective.

It is not about forcing the other person into submission. It is about making your position easier for them to examine—and ultimately easier to accept.

So, the next time you disagree with someone, resist the temptation to throw the first verbal punch.

Do not begin by telling them what you oppose.

Begin by identifying what you share.

Detach the point of contention from the person. Place it at the centre of the conversation and frame it as a common problem that both of you are trying to solve.

Because if you genuinely want to change someone’s mind, the conversation should never become:

Me versus you.

It should become:

You and me versus the problem.