system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is MH370 described as "the only known missing 777," Why wouldn't we know of other missing ones?
gpt
There are 1313 of them. 3 have been scrapped, 2 destroyed and 2 with private owners. The scrapped ones were probably cut and up recycled, but nobody knows for sure where each part ended up. Until somebody goes and verifies the location of each one it's possible, but very unlikely, that another one is missing.