[notfashion]

If you read to the end, there's a mention of the premature collapse of the probabilistic inference about some entity. That clarifies what the author is talking about.

The scenario is something like a situation in which individuals are categorized into two discrete groups, and then inference proceeds as if the fate of each individual has been determined by which group they fell into (rather than determined probabilistically). The fact that a discrete categorization is assumed to 'determine' the outcome (the possibility wave function 'collapses' at the moment of categorization) could certainly be referred to as deterministic. I agree that it's not an application of the word that we are familiar with.

[randcraw]

Maybe 'fuzzy set' categorization would be better than 'deterministic'?