Of 54, only two achieved something like perfection -- Abraham Lincoln's in 1865 and John F. Kennedy's in 1961.
We note that, of 25 active versus active treatment comparisons, only two achieved conventional statistical significance.
But in the 20 years since then, only three achieved the feat -- Marquette in 2003, Georgetown in 2007 and now Villanova in 2009.
Only one achieved prominence: João Alfredo Correia de Oliveira, who as President of the Council of Ministers would, on 13 May 1888, secure passage of the law that extinguished the last vestiges of slavery in Brazil.
Ten laboratories rated all samples correctly with regard to IgM, and only three achieved the full score for IgG detection.
This year's Cannes had a lot of very good films, but only two which achieved a sublime quality: Haneke's Amour and Carax's Holy Motors.
All the participating sites claimed that they could fulfil local research procedures within six weeks, but only four centres achieved this.
Vignette scores for care of very low-birth-weight babies were generally moderate-to-high, but only three hospitals achieved high overall scores for quality of ENC.
That flows to return points won: 35 women won at least 40 percent of their return points against the first serve, but only two men could achieve that.
While all PGPD participants improved quality, only two sites achieved the minimum 2% savings in the first year needed to qualify for a bonus.
But it was a rival steamer, the British-built Great Western, which made the crossing 74 times — the Sirius made only two — that achieved the real breakthrough in ocean transportation.
