Hi, This is a question about the Transactional Interpretation of quantum physics proposed by John G. Cramer. As you surely know this interpretation proposes that interactions only happen when the emitter has some sort of 'confirmation of receipt' by an absorber. In a sketch way we might say that the emitter emits a retarded 'offer wave' towards any potential absorbers in the future. Potential absorbers in the future send advanced 'receipt offer waves' into the past. Based on criteria which yield the same results as Schrodinger's wavefunction the emitter 'chooses' which will be its actual absorber and the interaction becomes actual. In this scenario, at any given time it is still impossible to predict with accuracy what the outcome will be. To the eyes of any 'normal' observer this looks like non-deterministic physics. But knowing the future outcome in advance makes it deterministic in practice. The 'knowledge' of the future absorption by the emitter is the ingredient which makes the outcome what it will be. When the emitter behaves as it does because it already knows the future outcome in advance, we can say that the future outcome is deterministic, it is based on the present knowledge (even if that knowledge can never be obtained by humans, but only by the emitter entities). Considering this, should the Transactional Interpretation be considered an undeterministic or a deterministic theory / interpretation?