It is not, as the publishers claim, the first major biography for 30 years – an excellent Life by David Riggs was published in 1989 – but it is now certainly the definitive one.
Although taken together all these mechanisms provide a plausible explanation for the development of the North American cratonic sequences, they are certainly not definitive, conclusive explanations.
We presented a reanalysis of the available data and suggested that no empirical evidence supports any relationship between attention deficits and mental retardation per se, although available data is certainly not definitive with regard to this question.
Such self-abnegation might be the purpose of some forms of torture, as indeed it is of some forms of slavery and brainwashing, but it is certainly not definitive of torture.
The results of these studies are certainly not definitive and their interpretation was flawed by a basic DSM-5 misunderstanding of the nature of psychiatric diagnosis.
The response is more emphatic than the one administration officials gave The Huffington Post for this piece and certainly more definitive than what they have said in the past.
Certainly more definitive experiments will be required to fully elucidate the role of the MAPK pathway, including substrate specificity and individual contributions of each kinase.
The cost-effectiveness of lung cancer LDCT screening has been estimated by a number of groups, which were reviewed by Black et al (2006), who found the current estimates difficult to interpret and certainly not definitive.
These trends, while certainly not definitive proof, are thus consistent with the hypothesis that the replicate populations in the temporally fluctuating resource environments were evolving toward distinct fitness peaks.
Although this study is certainly not definitive, it adds to the growing literature that supports use of clindamycin in severe iGAS; however, the adjunctive role of IVIG remains unclear, although there is some suggestion of benefit.
