Cid has only heard the stories secondhand, from Himeka and G'raha Tia, and he can't even pretend to comprehend most of it, but at the very least, he did understand that despite apparently being summoned to the First in fair quick succession, time didn't pass so evenly there. Can souls age separately from the body?

"Aye, that would explain the disconnect between our memories, but not how I managed to return to our supposedly destroyed world."

It leaves him much to think about, and no easy way to get answers.