In this episode, Phil and Eric tackle two of the “centering diphthongs” (aka the r-colored diphthongs in rhotic accents), square and start. Much of the episode is spent tackling the very subtle possibilities of vowel quality where these lexical sets might be realized, and the fun that one can have tweaking those possibilities—smoothing, breaking, more or less rhoticity, more open vs. more close nuclei or codas. FUN!