Since 2009

Cerebroom

Sweeping dust off truth, one thought at a time.

Essays by Chad Twedt · psychology · ethics · education
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Freshly swept

The newest essay
Religion · 12 June 2026 · 13 min read

A Lens Inspired By Detection Theory

Suppose you are told to construct an algorithm that will automatically detect missiles flying over the Pacific Ocean so that a missile defense system can…

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Coined here

four names for things that had none
  1. No. 01 · 2009

    Perception Imposition

    noun

    Immediately after a concert I gave a few years ago, a pianist introduced himself and said he’d be interested in being presented at the same venue in…

    7 min · 1 comment →
  2. No. 02 · 2009

    Illusory Gain or Loss

    noun

    One of the hottest topics that piano teachers talk about when they get together is make-up lesson policy. The classic conflict arises when a student insists…

    4 min · 6 comments →
  3. No. 03 · 2009

    Environmental Normalization

    noun

    In Fall 2004, I taught two sections of Math 120 at University of Nevada, Reno. Before classes began, I spent many hours trying to come…

    8 min · 1 comment →
  4. No. 04 · 2011

    Consequence Displacement

    noun

    It has been a while since I coined any new psychology terms. Too long. I have another one I’ve been dying to share, because it…

    15 min · 3 comments →

A series in three parts

Philosophy

The whole pile

10 essays
  • Religion · 2026A Lens Inspired By Detection Theory

    Suppose you are told to construct an algorithm that will automatically detect missiles flying over the Pacific Ocean so that a missile defense system can…

    13 min
  • Philosophy · 2020Utilitarianism and Deontology Part 3: The Wrongness-to-Goodness Ratio

    Part 1 of this series shows that the only difference between those who call themselves deontologists and those who call themselves utilitarians is a subjective…

    4 min
  • Philosophy · 2013Utilitarianism and Deontology Part 2: Hollywood & Dexter

    “Do what is right, though the world may perish.” – Kant Any movie that begins with this hard-core deontological quote fading in and out of…

    17 min
  • Philosophy · 2013Utilitarianism and Deontology Part 1: The Subjective Line

    Would you kill one person to save five people from dying? Studies (both theoretical and simulated) have shown that around 90% of people would indeed…

    7 min
  • Education · 2011Public School System Changes Needed for the Benefit of Students

    There are parts of our public school system that need to change. My experience in high school gave me as much perspective on this as…

    13 min · 1 comment
  • Psychology · 2011Consequence Displacement

    It has been a while since I coined any new psychology terms. Too long. I have another one I’ve been dying to share, because it…

    15 min · 3 comments
  • Psychology · 2010Keep Your Goals To Yourself

    Contrary to popular belief, repeated studies have shown that sharing a goal with others makes your goal less likely to come true. Telling someone about your…

    8 min · 2 comments
  • Psychology · 2009Environmental Normalization

    In Fall 2004, I taught two sections of Math 120 at University of Nevada, Reno. Before classes began, I spent many hours trying to come…

    8 min · 1 comment
  • Psychology · 2009Illusory Gain or Loss

    One of the hottest topics that piano teachers talk about when they get together is make-up lesson policy. The classic conflict arises when a student insists…

    4 min · 6 comments
  • Psychology · 2009Perception Imposition

    Immediately after a concert I gave a few years ago, a pianist introduced himself and said he’d be interested in being presented at the same venue in…

    7 min · 1 comment

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