The system may reject the utterance (correctly), misrecognise the semantic value of the utterance, or recognise the correct semantic value of the utterance.

When stores were prelittered with 140 marked handbills, the littering rate increased, but only to 5%.

The gate was five-barred, put together from crooked tree limbs, grey corkwood and sally wattle, iron coachbolts drilled through at the joints […] .

a predictable mathematical pattern