probability - Probabilistic logic vs. analog -

there research articles (e.g. chakrapani & palem) , devices (e.g. lyric) use so-called probabilistic logic. suppose idea outputs of such device, given inputs, converge probability distribution. difference between these devices , using analog signals? is, these devices still considered digital, analog, mixed-signal?

this paper seems describe novel kind of (probabilistic) boolean logic, , not implementation. skimmed through paper, seems 1 of theories. there is, way, simple reason why probabilistic logics don't give classical logics give you, namely, not truth functional (i.e. value of & b not depend solely on value of , value of b).

as implementing such thing on chip: think both possible. if digitally, you're calculating probabilities, , can run code on cpu. don't know analog implementations, guess elementary analog component (transistor, opamp etc) can seen performing kind of basic arithmetic operation on voltages , currents. whether circuit gives outputs adhere to, or approximate, kolmogorov laws of probability, that's question, guess is: somehow possible , maybe has been done.