system
A chat on subreddit /r/wallstreetbets
human
You have to remember, it doesn't happen instantly and it doesn't go away.  

That peak increased prices by a large amount but they won't come back down, it's just preventing future price increases. We aren't all better just because inflation is now negative
gpt
The YoY change of a measurement of inflation is negative compared to last year at this time. This is still inflation...just slightly less than what it was a year ago.