I click on Box pattern. It says that before trying the Box, one should master the HalfBox pattern. I want to see how the HalfBox pattern looks like, so I try to click on HalfBox, but it's not a hyperlink. So I look to the left, where Box is, and try to look for HalfBox under Box. It's not there (it's not even under the letter H, because it's under the number 441).

On the Box page, HalfBox is in a square frame on the top-right. If wikipedia were like this it would be unusable.