Despite the stupidity at the end there, he is right you know.
All Macs are PCs, but not all PCs are Macs.
Saying Mac vs PC, is like saying iPhone vs Smartphone. iPhones are smartphones too, what you're supposed to say is Android, and then of course there are Windows Phones as well.
If you just say Mac vs PC, you're bundling all types of computers into just one label, even ones so outdated that no one uses them anymore.
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All Macs are PCs, but not all PCs are Macs.
Saying Mac vs PC, is like saying iPhone vs Smartphone. iPhones are smartphones too, what you're supposed to say is Android, and then of course there are Windows Phones as well.
If you just say Mac vs PC, you're bundling all types of computers into just one label, even ones so outdated that no one uses them anymore.