So recently, a friend came up to me while I was mining dead trees and asked me if i needed sticks. I said no, and he said that they were useless. I never knew that people didn't know about sticks being fuel. The only fallback about it is that sticks can't forge trunks. So here is the proof:
*Note that you can craft lava, and it doesn't matter in which slot you put the fuel and item*
I'm sorry if you already knew this and I just wasted your time.