Commenters didn't look at the chart to understand your question.
It's just a mistake in the chart.
"No" should point somewhere else to continue classifying. Also "someone" is ambiguous -- it could mean "someone nearby" (not meteorite) or "someone far away" (possibly meteorite).
I don't think it's a mistake - just a cheeky note that if you "saw it fall," you probably didn't. Your own link supports this.
> If you saw a meteor and later found a stone, then the stone is not a meteorite
> Meteorite fragments land far from where you last saw the meteor and there is no way that observers at a single point on the Earth’s surface are going to find fragments of the meteorite. It requires triangulation from several viewpoints, usually with cameras.
It's just a mistake in the chart.
"No" should point somewhere else to continue classifying. Also "someone" is ambiguous -- it could mean "someone nearby" (not meteorite) or "someone far away" (possibly meteorite).
https://sites.wustl.edu/meteoritesite/items/some-meteorite-r...