Every "I think" is stronger with a "because"

It rained hard on Tuesday night, the kind of rain that rearranges a place by morning. When we set off for the shops the next day, the little footpath we always take — the shortcut between the houses — had a new feature: a stretch of thick brown mud where the puddle had been, wide enough that you couldn't step over it and deep enough that you wouldn't want to try. I was already turning to go the long way round when my daughter stopped, disappeared behind a fence, and came back dragging an off-cut of board almost as long as she was. She laid it flat across the mud, tested it with one foot, and walked over like it was nothing. "Come," she said, not even looking back.

I crossed on her plank and made a mental note — clever girl — and we carried on to the shops. It took me the rest of the day to see that she'd shown me something much bigger than a way across a puddle.

Here is a thing we let slide, in classrooms and kitchens and comment sections alike. We accept "I think." I think she's wrong. I think that team is better. I think we should. And we stop there, as if the thinking is finished when it has barely started. But "I think" on its own is just a flag planted in the ground. Anyone can plant a flag. It costs nothing and proves nothing.

The word that turns a planted flag into actual thinking is small and unglamorous: because.

A "because" is the plank. It's the thing you lay down between your opinion and the solid ground of a reason, so that another person can actually walk from where you're standing to why you're standing there. Without it, an opinion is just someone on the far side of the mud, shouting a claim nobody can reach. With it, you've built a way across.

And here's the quiet magic of it — the part worth teaching a child on purpose. A "because" doesn't only let others cross to you. It makes you test whether the far side will hold your weight. Sometimes you reach for your reason, ready to lay the plank, and find there's nothing solid on the other side to rest it on — no real evidence, just a feeling you'd dressed up as a fact. That moment, when the "because" won't reach, is one of the most valuable in all of thinking. It's where an honest person quietly changes their mind. A reason isn't only how you convince other people; it's how you check yourself before you do.

The world our children are growing into does the opposite. Online, on the loudest channels, at the angriest edge of every argument, the trick is to say "I think" louder — never to lay a plank. Certainty is performed; reasons are optional. A young person who reaches for "because" by habit isn't just more persuasive. They're harder to fool, including by themselves.

So build the habit gently, and mostly by doing it yourself. Say your own reasons out loud — I think we should leave now, because the traffic builds after four. Ask "because?" the way you'd ask about something interesting, not the way you'd ask in a trial. And when the reason a child offers is small or wobbly, don't knock the plank away — help them find a stronger one.

Which brings me back to the mud.

I've thought about that off-cut of board more than a scrap of wood deserves. Because she hadn't just found a way across a puddle. She'd built, without knowing it, the exact shape of a good thought: an "I think" on one side, solid ground on the other, and one plain plank laid between them — turning a claim you can only shout into one a person can actually cross.

Every "I think," it turns out, is stronger with a "because."