This is a video that shows all the important samples that were used on Logic's 2015 sophomore album "The Incredible True Story". Hope you enjoy!

Sample chain found:

"Deck the Halls" by The Singers Unlimited is a cover of the traditional folk song "Deck the Halls"

"Clair" by The Singers Unlimited is a cover of "Clair" by Gilbert O'Sullivan

"Maybe So, Maybe No" by Mayer Hawthorne is a cover of "Maybe So Maybe No" by New Holidays