trzes
I'd like to step out of this algebraic mire and point out that no method of divination cannot predict anything with 100% accuracy. They can lay out variables (here we go again), help you see the pattern of a situation, the forces at work, and its possible outcomes. But those forces at work include the hidden, what the querent cannot see.
Therefore, I just don't see why a reader cannot foresee a probable pregnancy in the immediate future of a querent. I once saw clearly in the cards that a friend of mine was going to be fired soon. It was plain as day. (It was a Lenormand reading: Cross + Tower + Scythe. She worked at a Catholic school.) I told her so. She laughed. A few weeks later, it happened. I am pretty sure the decision had been already taken at the time of the reading. She just didn't know.
ETA: I do not in any way condone the particular reading in this thread, which I know nothing about. But, IMHO, such a forecast is indeed withing the realm of possibility.
Well, the realm of possibility is almost unlimited, no doubt. And therefore any kind of prediction is possible. It may work out of sheer luck, or because the people forecasting have gathered some useful information, or because divination is at work. And there might be forms of divination that don't even need a specific layout of cards to work. All this is possible. And none of these divination concepts can be proven wrong.
But just because it's possible that alone doesn't mean it's likely to be true.