I have a memory like a sieve. For certain things. Unfortunately lyrics are one of those things....now chords are not. I doubt if I've played a wrong chord to a song in twenty years, but I've butchered soooo many lyrics in that time, it drives me to distraction.I wouldn't worry too much about the "finger in the ear" types Unicorn. Try your best to learn the lyric, but if you need help...use a sheet. It's not like we're Nuclear Physicists or something.
Cheers
P.S. Kendall was one of the very best guitarists I met last year. Why? Because he plays top notch rhythm guitar, his timing is impeccable, and he and the instrument are one. I hate complex playing...simply for it's own sake.
Rick