A money book presents low, middle and high income scenarios. The middle column may look like a prediction, but its position on the page does not establish that it is the most likely outcome.
Identify what changes between columns
List the assumptions: income, timing, costs or another input. A scenario says what the calculation produces if those assumptions hold. It does not automatically say how often they will hold or whether they cover every plausible outcome.
Look for the basis of any probability
If the author assigns likelihoods, examine the evidence and method behind them. Without that information, keep “illustrative case” separate from “forecast”. Averaging three invented scenarios does not transform them into a reliable estimate.
For a study note, choose one assumption and explain how changing it affects the result. This makes the example useful even when it cannot predict your future. The goal is to understand sensitivity and dependencies, while recognising that personal financial decisions need circumstances and evidence beyond a neatly arranged table.