Schema: CREATE TABLE useracct (name VARCHAR, u_id VARCHAR); CREATE TABLE trust (source_u_id VARCHAR)
Question: Find the name of the source user with the highest average trust score.
SQL: SELECT T1.name FROM useracct AS T1 JOIN trust AS T2 ON T1.u_id = T2.source_u_id GROUP BY T2.source_u_id ORDER BY AVG(trust) DESC LIMIT 1