As to the problems that concern bidding, the experts' answers and comments lost clarity as the Culbertson/Goren consensus (four-card majors, strong notrump, strong two-bids, two-over-one showing only about 10 HCP) began to fall apart during the 1950s and 1960s. The experts' answers became influenced less by judgment and more by system, some experts even abstaining on occasion because they could not use a favored treatment. When different experts preferred different systems it became difficult to reach consensus and the comments became less valuable.