That was an interesting read, thanks. I'm not convinced that the "cost" of a b-ary digit is appropriately modelled as exactly b in all circumstances, though it

That was an interesting read, thanks. I'm not convinced that the "cost" of a b-ary digit is appropriately modelled as exactly b in all circumstances, though it is in the example of minimising the average length of time a caller must wait when using a phone menu system.