Straw Man Arguments: The Low-Openness Reflex That Simplifies What It Can't Process

You say the city should slow down new development until the water infrastructure catches up. The reply comes back: "So you want to ban all housing and freeze the whole town in amber." You never said that. But now that is the position on the table, and it is a much easier one to knock over. That is a straw man: replace the argument someone made with a flimsier one they didn't, then win against the copy.
Most writing about the straw man treats it as a dirty trick, something dishonest people do on purpose. Sometimes it is. More often the person genuinely believes they are responding to what you said. They built the simpler version because the real one would not fit in their head, and they never noticed the swap. That failure to hold the actual shape of another person's position has little to do with honesty. It runs through a couple of Openness facets.
Intellect is the working memory of an argument
Intellect (O5) is not IQ. It is the appetite for holding an idea in its full, uncomfortable complexity long enough to work with it. A high scorer can keep your qualifier attached to your claim, the "until" and the "unless," and respond to the whole thing. Low O5 finds that effortful and mildly unpleasant, so the mind does what minds do with a load they would rather not carry: it compresses. Your three-part position gets rounded down to its loudest part, the caveats fall off, and the person answers the compressed version in good conscience.
You can hear the compression happening. Someone reflects your point back and every hedge you built in has vanished. "Slow down until the water catches up" becomes "ban housing." The version they are attacking is real to them, just not yours.
Imagination is the ability to inhabit a view you don't hold
Steelmanning, the opposite of straw-manning, means restating someone's argument in its strongest form before you answer it. Doing that requires you to temporarily live inside a position you disagree with, and that is a job for Imagination (O1). Low O1 keeps you anchored to the concrete and the familiar, which makes the leap into an opponent's frame genuinely hard. If you cannot picture why a reasonable person would hold the view, you will reconstruct it as something only an unreasonable person could hold. The straw man is what a position looks like when someone tried to imagine it and could not.
Add low Liberalism (O6) and the distortion gets a motive. When challenging ideas feels like disorder, an opposing argument is not a thing to understand, it is a thing to neutralize, and the fastest way to neutralize it is to make it stupid first. Understanding an argument and wanting to defeat it pull in opposite directions here.
Why the simpler version feels like the true one
The straw man is comfortable because it confirms what you already thought about the other side. If their position is obviously foolish, you were right all along, which is confirmation bias doing the editing before you even reply. The distorted version is not a random simplification, it drifts in the exact direction that makes your existing view look better.
It also travels in packs with other shortcuts. Flatten a layered stance into a cartoon and you are one step from a false dichotomy, since a cartoon position has only two settings, and one step from attacking the person who supposedly holds it rather than the idea, which is where the ad hominem takes over. They are all versions of the same move: reduce what you have to deal with until it becomes something you can beat.
Checking your own copies
Before you answer anyone, there is a test. Could the other person read your restatement of their view and say "yes, that's what I meant"? If you are quietly sure they would object, you are arguing with a straw man, and it is yours. Low O5 and low O1 make that copy form automatically, below the level where you would catch it, which is exactly why it feels like the real thing.
The 30-facet OCEAN personality test scores Intellect, Imagination, and Liberalism separately, and the three together predict how much of another person's argument survives contact with your understanding of it: whether the caveats make it through, and whether the thing you end up answering is the argument that was actually made. The developer who wanted to fix the water pipes is still standing there. Nobody has responded to him yet.