Exercise 1: Irregular Income Points Toward the Higher End — Possible Solution
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The chapter's own real caveat says the right number depends on income
stability, not a fixed universal figure - a stable, salaried income
(especially with a second household income) can reasonably manage
toward the lower 3-month end, while genuinely irregular or
self-employed income should lean toward the higher 6-month end (or
more), since real income interruption is both more likely and harder
to predict in advance for that kind of work.

A freelancer with irregular monthly income fits squarely into the
higher-risk category the chapter describes - there's no predictable
paycheck guaranteeing a stable, minimum income each month, so a real
gap between projects or a slow period is a genuinely more likely event
than it would be for someone in stable salaried employment. A larger
buffer gives more real runway to cover essential expenses through a
longer or less predictable dip in income, which is exactly the kind of
situation a thinner 3-month fund is less equipped to absorb.

ANSWER: The 6-month end of the guideline fits better here, because the
chapter's own caveat specifically flags irregular or self-employed
income as a case that should lean toward the higher end - genuinely
unpredictable income makes a real income gap both more likely and
harder to plan around than it would be with a stable salary, so a
larger buffer provides more real protection.

WHY THIS WORKS AS AN ANSWER
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This correctly applies the chapter's own explicit income-stability
caveat to the specific freelancer scenario, rather than defaulting to
the "3-6 months" range as if both ends were equally appropriate
regardless of income type.