Strong versus Valid Arguments

According to Epstein, A valid argument is when there is no possible way for its premises to be true and its conclusion to be false. A strong argument is when the premises is true but the conclusion to be false but thats unlikely. An example of a valid argument would be all asian people i know have a history of knowing martial arts, so since im asian, i know martial arts. A strong argument would be if i told the DC employees that i was lactose and they say i can still have the ice cream because it non-dairy. Its strong because the person i asked works at the DC and they make the syrup. This argument can be true and false but mostly true because i havent gotten any issues yet, so im good.