ሺ݄ ൌ ‫ݓ‬ ି ሻ ‫ؠ‬ ሺ‫ݓ‬ ି ‫א‬ ݄ሻ ‫ת‬ ሺ∆ൌ ݇ሻ.
the probability in Eq.1 can be written as: where the likelihood ܲሺ‫ݓ‬ ି ‫א‬ ݄, ∆ൌ ‫ݐ|݇‬ ൌ ‫ݓ‬ ሻ measures how likely the joint event ሺ‫ݓ‬ ି ‫א‬ ݄, ∆ൌ ݇ሻ would be observed given the target-word ‫ݓ‬ .