Back on the original point: "Crisis of Conscience" mentions how Knorr argued with Franz in the early 70's as he wanted to revise it back to 1976....anyone remember this!
Actually, Franz wanted to change it to 1974, but Knorr wouldn't allow it.
The debacle about 1975 is this: The Society did not directly state in print that 1975 would bring Armageddon. But they insinuated it. They published all kinds of articles that stated it was a "probability". But think about this: They had already experienced many other prophetic failures, i.e. 1914, 1918, 1920, 1925, and 1941. They knew what they were doing when they started predicting 1975. They knew they couldn't come right out and state it.