- Mmm delicious soup
- Can you guess what's in it?
Well, this is onion...and this is definitely garlic
Can I have more garlic in the pitta please?
- This is onion, not garlic
Even if a phrase sounds odd at first, if you ponder it, you may find a grammatical context...the joys of language :)
"Hey, could you pass the garlic seasoning? .... No, this is onion, not garlic! I need the GARLIC seasoning!"
Curse you, rather unlikely but perfectly legitimate mass noun cases! XD