Damon Knight: "The Indigestible Invaders," "Backward, O Time" and "An Eye for What?"

We recently read a story from the October 1956 issue of Infinity by Harlan Ellison, and I noticed that advertised on the cover of the issue is a story by Damon Knight I have not read. So let's read it! And two other stories Knight published in the same period. We've already read a bunch of stories by Knight printed in 1956; "The Country of the Kind," "Stranger Station," "The Beach Where Time Began," and "A Likely Story" have all been subjects of MPorcius Fiction Log posts. I think we've only tackled two 1957 Knight productions, "Man in the Jar," and "The Dying Man" AKA "Dio." So, in addition to "The Indigestible Invaders," we'll read another '56 piece and an early '57 story, both of them from Galaxy, a magazine with a somewhat more serious and literary tone than many SF mags. As with Ellison, I think Knight is overrated and have doubts I would like him personally but still enjoy a significant proportion of his fiction and nonfiction, so, as we look into today's three stories, anything…