More difficult than necessary, largely due to the added challenge of divining the nature of the unnamed thing where the available cards live. It should be named (I'd suggest "diagnostic tableau" or similar), introduced in the setup section, and illustrated in a diagram that will make clear what is meant by "top row" and "bottom row" here in main rules.
Examples would be a little easier to read if the active player were given an name and used pronouns consistent with that name (say, Joseph - he, Marie- she, etc...) rather than simply a position number and arbitrary pronoun.