The phrase "a firm proof" is correct and usable in written English.
It can be used when referring to a strong or conclusive piece of evidence or argument that supports a claim or theory.
Example: "The scientist presented a firm proof of her hypothesis, which convinced the entire panel of experts."
Alternatives: "a solid proof" or "a strong proof".
The increased susceptibility of post-septic animals to subsequent infectious insults either to weakly virulent pathogens or to low pathogen loads known to be innocuous in immune-competent animals provided a firm proof-of-concept of sepsis-induced immune suppression [36,37].
The increased susceptibility of post-septic animals to subsequent infectious insults either to weakly virulent pathogens or to low pathogen loads known to be innocuous in immune-competent animals provided a firm proof-of-concept of sepsis-induced immune suppression [ 36, 37].
But none of these connections per se give any firm proof about Etruscan "origins," and current scholarship is much more concerned with understanding the interrelationship of these influences and the context in which the civilization in Etruria developed.
Not only is the distance is too great for coconuts to float and survive, there is no reliable evidence for the presence of Polynesian settlements, or any firm proof of pre-Columbian coconuts (Clement et al. 2013) and the genetic data identify the Philippines as the most likely source.
And while there has been plenty of speculation about who is behind it many believe it was North Korea, though a North Korean diplomat has issued a denial no firm proof to determine the hackers' nationalities has surfaced.
The author shows that while there was no firm proof of a slave conspiracy, whites' fears of such an apocalypse were palpable.
Glencore's Christmas swoop on Katanga Mining was something of a signature deal for the firm, proof that it can use its role as the trading world's biggest middleman to its advantage.
These state that disruption and reconstruction of the gene under investigation coupled with loss and regain of the phenotype is needed for firm proof of a functional role.
This is a big step for Microsoft and firm proof that their support for open standards, data portability and interoperability extends to more than just press releases and announcements.
That is why people who collect antiquities are more — not adventurous, but they are more like artists in a way, because they don't require the firm proof that this is in the catalogue raisonné of Joan Miró.
People appeared genuinely excited about this, even though 2001's unfortunate Crocodile Dundee in Los Angeles holds an 11percentt Rotten Tomatoes rating and exists as firm proof that Mick Dundee doesn't necessarily translate for contemporary audiences.
