What are probabiliorists?

Some articles on probabiliorists:

Catholic Probabilism - Probabiliorism
... subsequently the Dominicans in the main were Probabiliorists ... The Franciscans as a rule were Probabiliorists, and in 1762 a general chapter of the order at Mantua ordered its members to follow Probabiliorism ... The Augustinians, Carmelites, Trinitarians and many Benedictines were also Probabiliorists ...