Twinned Glyphs

[MarcoP]

The key insight from gallows glyphs is that their graphical similarity seems to be mirrored with their function in words. While we do not know their values (or even what kinds of things they might stand for) we can tentatively say that gallows glyphs show evidence for design in the script. 

I agree and the two benches ch Sh form another couple of glyphs that look similar and behave similarly.

These couples could also share some similarity in behaviour, but this is less clear:

• r s
  
• g d 
  

At a different level, also the three glyphs that Stolfi called "circles" (o a y) can be said to share a similar bahaviour (see Emma's discussion You are not allowed to view links. Register or Login to view.).

An interesting case of systematic design from the same time frame as the VMS is You are not allowed to view links. Register or Login to view.(the vowels in particular, but the whole alphabet is based on combinations of two basic shapes).