I said at the bottom of that post exactly where I got the information. My timeline came from the wiki entry on Italian education, and from the U of Milan website. In Italy, unlike in the US, it is required to have a Master's degree prior to getting a Doctorate. Their timeline appears to be more strict than that for American education. Furthermore, unlike the timeline we would have to believe if that document posted at Nyteknik represented a Doctorate earned by Rossi, your own personal timeline to a Doctorate is actually possible in the Italian model. Rossi's is at least a year too short. (Although, as I already pointed out, I have my doubts as to the authenticity of the letter as posted on the Nyteknik site.)
BTW, much of the U of Milan website can be accessed in English. And the parts that are only in Italian can be translated by Google.
Just because you don't like the results of my on-line research, doesn't mean I was sloppy or incomplete about it. You are free to look at the U of Milan website and find the exact degree that Rossi claims to have earned and post it here, with links, to prove me wrong.
The problem with your research is (as usual) you are ASSUMING things you flatly don't know, and did not bother to find out. Specifically, whether or not the degrees/requirements have CHANGED in the time period between 1975 and today. The Italian comment I quoted says specifically that they HAVE changed, and that the degree that Rossi has was, at one time, the highest degree offered at Milan, but is no longer so. That commentor doesn't get into specifics as to what current degrees/requirements are. And in fact your own U. of Milan link ALSO says that the university made major changes in degrees and requirements in the 1990's, but doesn't give specifics as to what things were chaned FROM.
There is no indication that Rossi's degree isn't perfectly legitimate for the time and place granted. Other than, of course, your imagination.