It is not clear to me that there are well-defined boundaries between what you call a conjunctive and a disjunctive argument. I am also not sure how two opposing predictions are not both antipredictions.
I see that some predictions are more disjunctive than others, i.e. just some of their premises need to be true. But most of the time this seems to be a result of vagueness. It doesn’t necessarily speak in favor of a prediction if it is strongly disjunctive. If you were going to pin it down it would turn out to be conjunctive, requiring all its details to be true.
All predictions are conjunctive:
If you predict that Mary is going to buy one of a thousand products in the supermarket, 1.) if she is hungry 2.) if she is thirsty 3.) if she needs a new coffee machine, then you are seemingly making a disjunctive prediction. But someone else might be less vague and make a conjunctive antiprediction. Mary is not going to buy one of a thousand products in the supermarket because 1.) she needs money 2.) she has to have some needs 3.) the supermarket has to be open. Sure, if the latter prediction was made first then the former would become the antiprediction, which happens to be disjunctive. But being disjunctive does not speak in favor of a prediction in and of itself.
All prediction are antipredictions:
Now you might argue that the first prediction could not be an antiprediction, as it does predict something to happen. But opposing predictions are always predicting the negation of each other. If you predict that Mary is going shopping then you predict that she is not not going shopping.
It is not clear to me that there are well-defined boundaries between what you call a conjunctive and a disjunctive argument. I am also not sure how two opposing predictions are not both antipredictions.
I see that some predictions are more disjunctive than others, i.e. just some of their premises need to be true. But most of the time this seems to be a result of vagueness. It doesn’t necessarily speak in favor of a prediction if it is strongly disjunctive. If you were going to pin it down it would turn out to be conjunctive, requiring all its details to be true.
All predictions are conjunctive:
If you predict that Mary is going to buy one of a thousand products in the supermarket, 1.) if she is hungry 2.) if she is thirsty 3.) if she needs a new coffee machine, then you are seemingly making a disjunctive prediction. But someone else might be less vague and make a conjunctive antiprediction. Mary is not going to buy one of a thousand products in the supermarket because 1.) she needs money 2.) she has to have some needs 3.) the supermarket has to be open. Sure, if the latter prediction was made first then the former would become the antiprediction, which happens to be disjunctive. But being disjunctive does not speak in favor of a prediction in and of itself.
All prediction are antipredictions:
Now you might argue that the first prediction could not be an antiprediction, as it does predict something to happen. But opposing predictions are always predicting the negation of each other. If you predict that Mary is going shopping then you predict that she is not not going shopping.