(Laughter) And that's terrifying, because the theoretical models that always work out in the answer key in the back of a teacher's edition, that's great, but it's scary to talk about sources of error when the theoretical does not match up with the practical.
(Tertawa) Ini menakutkan. Karena model teoritis yang selalu tercantum di kunci jawaban di buku teks edisi guru, ini bagus, tetapi sangat menakutkan untuk berbicara tentang asal-usul kesalahan ketika teori tidak sama dengan praktek.