Challenge 1: A Logo With Two Strokes and a Fill on the Same Shape — Solution Walkthrough

The answer:

Illustrator's Appearance panel is the right fit here. Per this
chapter's own material, it can stack multiple fills and multiple
strokes on a single object, each layered on top of the last, with the
stacking order directly affecting the final look. The bold outer
stroke, the thinner inner stroke, and the fill can all live on the
exact same shape as three separate, independently adjustable entries
in that same panel.

Why Inkscape's Fill and Stroke dialog wouldn't handle this directly:

Per this chapter's own comparison table, Inkscape's dialog manages one
fill and one stroke per object — it has no equivalent multi-layered
stacking model. Achieving the same double-stroke look in Inkscape
would require a different approach, such as duplicating the shape and
giving each copy its own single stroke, rather than stacking multiple
strokes on one object directly.

Why this matters for choosing a tool for this specific task:

This is exactly the kind of genuine, concrete difference this chapter
names honestly rather than smoothing over — not a case of one tool
being generally better, but a specific feature (multi-fill/stroke
stacking) that only one of the two tools offers directly.

WHY THIS WORKS AS AN ANSWER
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This exercise checks that a multi-stroke, single-object requirement is
correctly matched to Illustrator's own stacked Appearance panel model,
with Inkscape's single-fill/single-stroke limitation understood as a
real, named difference.