Attack your grammar? Please! You said the pictures were wrong and I didn't understand why they were wrong. This is not grammar. So ok, now you've admitted you used the wrong word, but how was I supposed to know that? I didn't show the picture so that we could discuss the porosity of the cross section, I only showed it so that the person who asked about it could see the inside ( underside) of the pyramid. That is my counterpoint. I was only showing the reverse side of the pyramids, not wanting to get into the MBD discussion.