Thanks Stan and Passel3,
Yeah, my short-term memory is horrible. Don't know if it's just my genetic lot, an issue of bad habits brought about by the information age (why remember when you can Alt-Tab right back to that Window and read it again?), or something that should improve with training/practice.
With the sentence-based solutions, one thing I thought was interesting is that they start from the first conclusion you can draw when you use the grid. So people who can do these without the grid would either have to model the grid in their mind, or they'd have to somehow see all the inclusions and exclusions at once and have the first deduction jump out at them.