"Truth is one; the sages just speak of it in different ways."
Yes. This is why I don't really care about all those interpersonal utility comparison complaints.You should only really care about interpersonal utility comparisons if you think there's some value to appeasing Felix.Otherwise, who cares?Granted - people who also don't worry about interpersonal utility comparisons should be more explicit about what it is they can "prove". Many are explicit about this (http://factsandotherstubbornthings.blogspot.com/2011/10/who-said-it.html), but many aren't.
btw - google informs me that your page is in Italian, and it prompts me to translate :) I wonder what would happen to the English if I do.
Meh - it doesn't do anything to the English. But no I know what your title means. I never bothered to look it up before.
Which is sad that I didn't know the title (hung up on "Bocca" - I know Verita, because my wife has a little figurine of the statue from her travels.
The photo is of a gimmicky "mouth of truth" machine in Siena -- you put money in, and the truth about you spits out. The real "mouth of truth" is in Rome from 1st century AD.