The test, while not observed personally by the author, seems to have been conducted with proper controls according to report.
It can be compared to the English perfect in which the speaker did not personally observe the past event.
"Have you personally observed every member of those groups?"
Every example I offer you on these euphemism topics has been personally observed.
I personally observed similar activity and so mar-shaled my team.
I have personally observed how ineffective these projects are.
Key members of parliament have personally observed this subject.
And I see that your attorney attests that he personally observed the.
Although presented with varying degrees of accuracy, these films provide a chance to see the game played, which otherwise may be difficult to observe personally.
To top it, Marcia saw the very thing that Gary was supposed to observe personally.