Sandwalk: What Is the "t-complex" and Why Should You Know About It?

I used to know all about it and even taught the underlying concept to undergraduates. That was 25 years ago and I'd forgotten what the t-complex was all about. Anonymous Coward¹ wanted to find out and (s)he posted a description on bayblab [WTF is transmission ratio distortion]. Normally I don't like linking to anonymous blogs but I'll make an exception here because this is cool.