Question

sejnowski rejected the usual top - down approach to reproducing human speech. he threw out the fat dictionaries of pronunciation and programs brimming with the rules of phonetics and the tedious list of exceptions to all the previous rules, which had no rhyme or reason. instead, he replaced all this with a surprisingly simple neural circuit. miraculously, netalk learns to speak english the way we do, from trial and error alone. no programs, no dictionaries, no rules, no rules for exceptions -- just the ability to learn from its mistakes.
-visions, michio kaku
check all of the words that give clues to the meaning of phonetics.
reproducing
pronunciation
exceptions
dictionaries
complete
based on this passage, which is the most likely definition of phonetics?
the system of sounds in speech
word meanings in english
the circuits involved in speech

Explanation:

The passage mentions "dictionaries of pronunciation" and "rules of phonetics". Dictionaries of pronunciation are related to the sounds in speech (phonetics deals with speech sounds). "Pronunciation" directly pertains to how words are sounded, which is the core of phonetics. "Dictionaries" here (dictionaries of pronunciation) also point towards the study of speech sounds as they would list pronunciations (sounds) of words. "Reproducing" is a more general term not specific to phonetics. "Exceptions" is too vague without a clear link to the nature of phonetics (which is about sounds).

Answer:

the system of sounds in speech