Should you speak or type to AI? Speaking keeps your thinking yours.

At 6am one morning this week, whilst being walked by my dog, I was listening to a forensic pathologist describe how she determines cause of death. Not by what she finds, but by what she doesn't find. She called it via negativa: the bruising that's absent, the blood that didn't pool, the mark that should be there but isn't. Absence as evidence.

What a cool concept, I thought. Somewhere between that and her explaining the difference between a post-mortem and an autopsy, something fired in my brain. I grabbed my phone and started speaking. Not typing. Speaking. Because the idea was moving faster than my fingers ever could, and I'd lost too many of those ideas to a keyboard.

What I concluded, talking blissfully to myself, was this: absence doesn't mean nothing happened. It means something specific happened.

When you read a LinkedIn post and something feels off, and you can't quite name it, but it feels smooth in all the wrong ways (cue the em-dash and the this-or-that framing), that's via negativa at work. Your nervous system is registering the absence of what should be there: the friction of a particular mind, the unexpected turn of phrase, the sentence that could only have come from one person, on one day, in one specific state of frustration, wonder or certainty.

That friction is not a flaw. It is the evidence that a real mind was there.

What the research says

MIT Media Lab published the first neuroimaging study of what AI does to your brain while you write, "Your Brain on ChatGPT". People who wrote with an AI assistant showed the weakest brain connectivity of all the groups. When they switched back to writing without it, the reduced engagement persisted. The researchers named it cognitive debt.

Researchers writing in Frontiers in Artificial Intelligence called it something else: the hollowed mind. A state where frictionless access to AI answers lets you bypass the effortful thinking that builds lasting knowledge, and lasting identity.

Your content doesn't feel hollow because it's badly written. It feels hollow because the process that generates your thinking has been bypassed. On a platform where so many posts are now AI-generated, sounding like you is a competitive advantage no model can replicate, because it requires being you, in the moment, catching the thinking before it's gone.

My tool stack

I use Wispr Flow for this. Not as a productivity tool, but as a thinking-capture tool. The voice notes that became this piece were messy and half-formed, but that mess is the thinking. The edit comes after. The origin has to be real. It has to be you, to portray you.

Why this matters beyond content

The same is true of the know-how in your business. Most owners can explain a process out loud far faster than they could ever write it down. That's why the Process Automation X-Ray lets you simply say it: our AI agent maps what you said, and the thinking stays yours.