1. answer to your question is, a solid wall can have a cavity, it's called a 9" cavity block, the evidence is in the cavity.
2. Why are you posting up pics/brochures of approx 9" long X 3" bricks ?, most people are aware of the dimensions, you've obviously just bought a measuring tape
3. I'm away for a week so I can't reply to your ignorance but to get back my last post, WHY ARE THE BRICKS IN THE 3"//6"/9"" WALLS THAT YOU HACKED THE RENDER OFF IN YOUR NOT GOOGLE PICS IN ABSOLUTLEY PERFECT CONDITION ?
I smell a rat