QENS data for the <(7)over bar S5> liquid crystal (both hydrogenous and chain-deuterated samples) have been analysed from a probabilistic (Bayesian) point of view. When a physical model cannot be proposed for a given reorienting system, it is appropriate to use probability theory to assess how many quasi-elastic components there is most evidence for in the data. A "component" can be thought of both as a single Lorentzian or as a more complex, non-lorentzian lineshape.