The “Think” pillar · ClearShifts Reasoning
Train how your fellows reason.
Not what to know — how to think. Five layers of reasoning, each a short, ordered path of tools a fellow learns and then puts to work on synthetic cases. Education, not a clinical decision tool.
Five layers of reasoning.
Each layer is a short, ordered path of reasoning tools. Open one to see its tools — learn them in sequence, then try a case that puts them to work.
01Diagnostic reasoningTurning what you see into a differential — the short list of conditions still in play. Built from illness scripts, problem representation, and the fast/slow thinking behind a first read.6 tools
- 1Learn →
Illness Scripts
Experts keep clinical knowledge as **typical patterns**, called illness scripts. They diagnose by matching the case to a script — not by checking off facts one by one.
- 2Learn →
Dual-Process Thinking
Your mind solves a case two ways: **fast pattern-matching** and **slow step-by-step thinking**. Most of the skill is knowing when to lean on each — and knowing that slowing down cannot fix what you simply do not know.
- 3Learn →
What Is · What It Means · What Should Be
Keep three things apart: **what you see**, what it means, and what you want. Set the goal as the flip side of the problem.
- 4Learn →
Developmental Framing
The same sign means different things at different ages. So you check every observation against what is **normal for that age** before you call it a problem.
- 5Learn →
Inductive & Deductive Reasoning in the MSE
Reasoning runs two ways. **Inductive** builds ideas up from what you see. **Deductive** tests one idea against its rules. Always know which way you are going.
- 6Learn →
Risk Formulation, Not a Checklist
Risk is a **working story** that drives a plan — not a one-time score you read off a scale.
02Logic & debiasingWhether your reasoning actually holds — validity vs. soundness, base rates, argument structure, and the biases that close a case too early.5 tools
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Sound vs. Valid Reasoning
**Valid** means the conclusion follows from the premises. **Sound** means it is valid AND the premises are true. A **sound** argument passes both checks.
- 2Learn →
Anchoring & Premature Closure
Two common reasoning traps: leaning too hard on the **first thing you hear**, and **closing the case too soon**. Plus one simple move that reopens the differential before you commit.
- 3Learn →
Base Rates & Natural Frequencies
Before you trust a positive screen, ask how common the condition is here first. Then count it out in whole people — "of 1,000 patients…" — instead of percentages.
- 4Learn →
Affect & Visceral Bias
A feeling about a patient — anger, worry, or liking — can quietly bend your read. The feeling is a **clue to check**, never the answer.
- 5Learn →
Argument Mapping
Lay a claim and its reasons out where you can **see** them. Then you can tell if the conclusion really follows — or if it just **sounds** right.
03Mental models & systems thinkingSeeing the case inside the system — inversion, second-order effects, and the patient inside the unit and the hospital.2 tools
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Inversion & Second-Order Effects
Think backwards. Ask **"what would make this go wrong?"** first. Then ask **"and then what?"** one step past the obvious result.
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Systems Thinking — Patient, Unit, Hospital
See the case inside the bigger picture — the unit, the team, the hospital flow — not just the one patient in front of you.
04Reflection & communicationMaking your thinking visible — calibrating your confidence, articulating your reasoning, and deciding with the family.3 tools
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Calibration & Self-Monitoring
Knowing how good your judgment really is — making how **sure you feel** match how **often you turn out right**.
- 2Learn →
Articulating Reasoning & Uncertainty
Say your thinking out loud — your best guess, one other guess you still hold, the one question that would tell them apart, and how sure you honestly are. That lets a teacher coach the **thinking**, not just the answer.
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Shared Decision-Making & Values
A good plan weighs two things: **what the evidence shows** and **what matters to this patient and family**. When more than one option is reasonable, you decide together, out loud.
05Knowing the personThe science of the person, as a lens for assessment — Big Five personality and the belief areas trauma touches. Learn the science first, then apply it.3 tools
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The Big Five
Five traits cover most of how people differ. Knowing where a person sits **changes how you read and engage them** — without labeling them.
- 2Learn →
Five belief areas trauma touches
Trauma can bend a person's beliefs in **five areas**: safety, trust, power and control, esteem, and closeness. Knowing the five areas gives you a map for what a survivor may be carrying. It is a lens for assessment, not a therapy.
- 3Learn →
Reading the person in the case
Personality and beliefs are **clues you reason from**, not labels you stick on a person. They help explain the case. They are never the diagnosis.
Metacognition, made practiceable.
Thinking about your own thinking — the Clarity Guide habits, for the work itself.