Question the signal.
Evidence, identity and trade-offs. Build decisions that survive a second look.
13 lessons · 71 minutes of reading and checks · Work at your own pace
From signal to evidence.
Learn to separate what you observed from what you believe it means.
Read the lessonWhat the queue cannot tell you.
Precision, recall and the customer cost of being wrong.
Read the lessonGive outcomes time to arrive.
Read disputes and cohorts without mixing their clocks.
Read the lessonThe rare-event trap
A strong detector can still create a mostly legitimate review queue.
Read the lessonWhat does confirmed really mean?
A model learns the labels you supply, including their blind spots.
Read the lessonA score is not a decision policy
Choose actions using consequences, capacity and uncertainty.
Read the lessonLook where the rule did not look
Audit the quiet population before declaring the controls complete.
Read the lessonThe next person should not start again
Turn an alert into a useful, bounded operational handoff.
Read the lessonRelated problems, different questions
Distinguish deception from the movement and concealment of criminal proceeds.
Read the lessonKnow the person. Understand the business.
Separate identity, control and the purpose of the relationship.
Read the lessonCollect for a reason
Make each field earn its place in the workflow.
Read the lessonThe name is a lead.
Resolve an alert through identifiers, evidence and accountable review.
Read the lessonDo not let the model see tomorrow.
Evaluate using information that actually existed at decision time.
Read the lessonPut one principle to work.
Choose a decision study. Before reading the next piece of evidence, explain what would change your view.
Open related practiceFollow the money.
From checkout to settlement. Understand the participants, messages and money movements.
Follow this route 02 / bankingOpen the system.
Accounts, permissions and bank payments. Understand what access does—and does not—mean.
Follow this route 03 / operationsKeep it moving.
Retries, records and reconciliation. Learn to diagnose the gap between a message and an outcome.
Follow this route 04 / riskQuestion the signal.
Evidence, identity and trade-offs. Build decisions that survive a second look.
Follow this route