[Casiopea]

Shun:

Now you seemed to agree to such a rule, quoted from The Linguistics Department of Stanford University:

The present perfect is not compatible with adverbials denoting a specific past time.

Not 'seemed', do. I have always agreed with it, and, moreover, am somewhat at a loss as to why you have assumed I wouldn't.

Shun:

But the quotations such as this have been repudiated by us, for quite some time now.

With all due respect, I am not familiar with 'us', their reputations or their repudiations.

Shun:

Do you now want to go back from the beginning, and agree to the "golden rule":

NOTE: We do NOT use specific time expressions with the Present Perfect. We cannot say, for example, "I have eaten spaghetti yesterday." http://conversa1.com/presentperfectpastsimple.htm

You've me confused with another postee, I believe. The above description holds true. I've never argued otherwise.

Shun:

Also even this: You CANNOT use the Present Perfect with time expressions such as "yesterday," "one year ago," "last week," "when I was a chlid," "when I lived in Japan," "at that moment," "that day" or "one day."
http://www.englishpage.com/verbpage/presentperfect.html

Again. I agree with the description.

Shun:

Is that what you wanted to say? If not, how can we depend on a wrong rule to support our discussion?

All of the descriptions hold true for me. :D