Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I have searched for related issues and found none that matched my issue.
• I have read the FAQ and my problem is not listed.

Playground Link

https://typescript-eslint.io/play/#ts=5.4.5&fileType=.ts&code=CYUwxgNghgTiAEAzArgOzAFwJYHtXwhwHMAKANygmRAC55VkBbAIxBgEo6yctgBuAFACIIDPDYwcMACoBPAA4hgdAHI4MAaVQ4A7qkHDiJCVLmLg7PkA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6Jge1tieQEMAZolp9oAc1gBbRC3RRE0aB2iRwYAL4h1QA&tsconfig=&tokens=false

Repro Code

declare function log(value: number): void;

let errorTyped: NotKnown;

log(errorTyped);

ESLint Config

module.exports = {
  "rules": {
    "@typescript-eslint/no-unsafe-argument": "error"
  }
}

tsconfig

{
  "compilerOptions": {
    // ...
  }
}

Expected Result

When the argument is of an "error" type, there should be some indication that it's not the same as an any. It's confusing for developers to see both "error" anys and "true" anys described with the same messaging.

Actual Result

Unsafe argument of type `NotKnown` assigned to a parameter of type `number`. 5:5 - 5:15

Additional Info

Split out of #8304 <- #8231.

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