Contradiction: Was There a Sojourn in Egypt or Not?

Peter, one of the regular readers here, pointed my attention to a post that shows a discrepancy in what the Bible claims about Jacob’s descendants spending 400+ years in Egypt. I won’t try to summarize it here — I wouldn’t be able to do it justice. Just check it out for yourself:
https://isthatinthebible.wordpress.com/2017/01/09/the-story-of-ezer-and-elead-and-what-it-means-for-the-exodus/