One reason it's hard to conclusively decide whether Adderall works as a " smart pill" is because its effects are so diffuse.
I cannot conclusively define the boundaries of a “humanitarian intervention” and neither can anybody else.
With the dozens of witnesses who conclusively identified him as the shooter, there is no defense that sets him free.
Nothing can be conclusively determined without an autopsy and even then we may never know for sure.
To be clear: There have been no double-blind or controlled studies that conclusively confirm this hair-loss hypothesis.
As their falsity has been conclusively and finally shown,24 I will not here lend importance to them by repeating them.
Well—that, as I may have remarked before, is indisputably and conclusively that.
"I don't think Catherine of Russia is a woman to whom a lady can point with pride," George said conclusively.
"And he—he hasn't been introduced to me," said Miss Lady, conclusively.
His own record of the matter in Oceana proves this conclusively.
1610s, "occurring at the end," from French conclusif, from Late Latin conclusivus, from conclus-, past participle stem of concludere (see conclude). Meaning "definitive, decisive, convincing" (putting an end to debate) is from 1640s. Related: Conclusiveness.