From the Archives: When a Knife Became a Comb

August 29, 1979 — Camp Leakey Guesthouse, Tanjung Puting, Central Borneo

Some moments are so ordinary at first glance, they almost slip by. But then they linger in memory like ripe fruit on a vine—sweet, unexpected, and revealing.

It was about 6:30 in the evening. Dinner was over, and Princess, my most curious and clever adopted orangutan daughter, was lounging near the student house. I was with Benny, one of our student assistants. We had been working with Princess on sign language for some time by then, but that night, she taught us a lesson in creativity.

Princess looked up at me and signed, “You comb.” I gently combed her hair with my fingers, and she closed her eyes, clearly enjoying the attention.

Then she spotted something on the ground—a table knife, left behind from dinner.

She picked it up carefully and signed again, “You that comb.” She was offering me the knife… to use as a comb.

I raised an eyebrow. I asked her, in sign, “What’s that?”

She studied it thoughtfully and signed “comb” again, followed by “pen.” She was trying out words she knew to label something new. Her guesses weren’t wrong, just… experimental.

I showed her the correct sign for knife, and she accepted it. But then, with deliberate calm and a look of expectation, she signed once more, “You comb,” and handed me the knife.

I gently scratched the back of her hand with the blunt edge—her version of a brushing motion. Satisfied, she handed it back to me and signed again: “You comb,” holding her head forward this time.

So I did. With the dull edge of a dinner knife, I gently “combed” her hair.

It wasn’t about the knife. It was about function—repurposing one object for another role. Princess wasn’t just mimicking language; she was assigning meaning. She saw a tool, imagined a use, and asked a friend to participate in her vision.

And in doing so, she reminded me that language, like intelligence, is fluid. It adapts. It invents. It connects.

And so does she.

— Orangutan Dad