There isn't a way to feed prohibitions between alternatives into the MaxDiff design before generating it, but there are some techniques on how to implement afterwards outlined in the MaxDiff ebook attached - such as including 1 alternative in the design then randomly replacing it in a subset of the questions after the design is generated. There's also a quick overview of some of those techniques on our Displayr blog here: [https://docs.displayr.com/wiki/Advanced_MaxDiff_Experimental_Designs|https://docs.displayr.com/wiki/Advanced_MaxDiff_Experimental_Designs|smart-link]