There are many ways to combine two (or several) information sources, in particular if they are independent; see, e.g., Genest and McConway (1990) for an overview.
p partially depends on max{t Li }, 4 which, for example, rules out the common logarithmic opinion poll: Instead we will use the linear opinion poll: Combining f m (x) and f p (x) gives a revised utterance level measure for N (x) > 0: where w m and w p are weights (w m + w p = 1).