MOORE — Most young people today call those who doubt them haters. Southmoore’s Jalen Adams has another word for the doubt delivered by so many who never thought he would make it as a football player: Motivation. When Adams sat in front of the Southmoore student body Wednesday and signed his National Letter of Intent to play football at North Texas, the doubters were on his mind. “My freshman year, coming into Southmoore, people were saying, ‘He’s just a fast guy,’” Adams said. “‘He’s