Sondheim teaches pronunciation
Note Sondheim's wince at the first slurring of 't's, but also his beautiful teaching style, his absorption with the potential of the lyric in its setting, his happiness at his pupil's success, his succinctness, his persistence to defeat the 2nd rate.
I'd also have asked the singer to improve 'careah' to 'career'. It's not at all that there's a proper way to speak or sing....there's an expressive way, an accurate way, a suggestive way... and before that happy state there is basic state of respect for words to be mastered and then riffed around. Mere slurring doesn't cut it.