Guided Mastery Path · Foundations
Step 4 of 10: Worked reasoning example
This is your path progress — how far you've moved through the recommended sequence. It is not a measure of what you've actually mastered; see "Your mastery evidence" further down for that.
A full worked example of classification reasoning, step by step, using the anchor category F40.
Worked example — distinguishing a specific phobia from ordinary caution
A 29-year-old avoids all situations involving dogs, crossing streets and rearranging routes to avoid houses with dogs visible in the yard. He has held this pattern since a dog bit him as a child. He describes intense panic, sweating, and a racing heart even at the sight of a dog on a leash across the street, and has declined social invitations to friends' houses that have dogs, which has strained several friendships.
Reveal step 1
Step 1 — Identify the trigger: dogs, a single circumscribed object.
Reveal step 2
Step 2 — Check disproportion: intense panic reaction to a leashed dog at a distance is disproportionate to any actual danger.
Reveal step 3
Step 3 — Check avoidance and functional impairment: rearranging routes and declining social invitations shows real avoidance with genuine impact on his life.
Reveal step 4
Conclusion — F40.2, Specific (isolated) phobia — the fear is bound to a single trigger, disproportionate, and functionally impairing.
All ten steps
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Orient
Block orientationWhat F40-F48 covers, why it is organised the way it is, and how its 7 categories relate to one another.
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Orient
Classification mapA quick-reference map of all 7 F40-F48 codes and titles, so you know the terrain before going deep on any one of them.
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Foundations
Foundational concepts and cautionsThe core diagnostic question this block answers, and the safety cautions that apply to every category in it.
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Foundations
Worked reasoning exampleA full worked example of classification reasoning, step by step, using the anchor category F40.
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Learn
Category learning unitsOpen each of the 7 category learning units in turn — this step tracks your progress across all of them.
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Compare
Boundary comparisonsWork through the Boundary Comparison Lab — what overlaps, what discriminates, and the most common learner error for each pair.
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Practise
Progressive case practiceThe Case Lab, including the staged Type C/D cases where new information arrives after your first judgement.
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Repair
Misconception repairThe Misconception Repair Lab: the tempting shortcut, why it fails, the better rule, and a short transfer check.
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Test
Mixed Mastery CheckNovel, mixed-order transfer items across all six reasoning dimensions, with a formative report at the end.
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Review
Session Summary and revisionYour Session Summary, plain-language state per mastery dimension, and where to go for Rapid Revision.
Jump to any step at any time — this path never locks you in.
Your mastery evidence (not the same as path progress)
This reflects actual answers from the Case Lab, Decision Lab and Mastery Check this session — it does not move just because you've opened more steps above.