Unfortunately, marginal likelihoods are generally difficult to compute. The log-likelihood is easier to maximize, especially for the multiplied likelihoods for independent random variables. Below table gives the "a priori" likelihoods of being dealt a certain hand-type. Most often the elements in PWMs are calculated as log likelihoods. Both decoders use the sub-block of "m" likelihoods for the payload data. Likelihoods determine if and when a threat will materialize, succeed, and do damage.