Fed Chair Powell Says No Conviction On What People Are Writing Down In Projections; 'We Just Don't Know' What Effects Of Energy Rise Will Be; Long Period Of Higher Gas Prices Would Weigh On Consumption, But Don't Know If That Will Happen; If We Were Ever Going To Skip An Sep, This Would Be A Good One; Inflation Overshoot Is Mainly From Goods And Tariffs; Very Low Breakeven Rate For Jobs; U.S. Economy Doing Pretty Well; No One Knows Effects Of Middle East Conflict