They may not have said so in so many words, but the thought was certainly left hanging there, and it was plainly obvious what they wanted us to think.
With all communication, it is not just what you say that matters, but more importantly, how it is going to be interpreted (this coming from somebody involved with High Voltage switching operations, where mis-interpretation of a written message is likely to result in death).
All I can say is that if the WTS didn't want us to think that 1975 was a probability, then their communication skills were abysmal!
Biil.