I remember during my PhD, a casual discussion on that figuring out the end of a sentence on it's own is surprisingly more complex then you'd think: "I work at

I remember during my PhD, a casual discussion on that figuring out the end of a sentence on it's own is surprisingly more complex then you'd think: "I work at the F.B.I. I like it there." "I work at the F.B.I., I like it there." "I work at the F.B.I. I like it there!" It's not as simple as counting periods. So that counting words can have corner cases is definitely understandable. Is "&" a word? It is literally just 'e' + 't' superimposed and "et" is definitely a word.