The phrase "abundantly demonstrated" is correct and usable in written English.
It can be used to emphasize that something has been shown or proven clearly and thoroughly.
Example: "The effectiveness of the new policy has been abundantly demonstrated through various studies and reports."
Alternatives: "clearly shown" or "thoroughly proven."
"They have also abundantly demonstrated that literature can be taken in new and exciting directions and that has to be good for readers everywhere".
The power of platforms has been abundantly demonstrated in the digital world; just think of the burgeoning range of increasingly powerful apps on our smartphones.
The Daesh death cult [a reference to Islamic State] has abundantly demonstrated that the first people it is coming for are the vast numbers of Muslims who don't agree with it".
England abundantly demonstrated both those qualities in announcing a squad of 17 players to defend the Ashes in Australia this winter.
"As I think has just been abundantly demonstrated, I am also running to break through the highest and hardest glass ceiling," she added.
Numerous such HRH lessons have sprung from Africa's 20 years of health reforms, which have abundantly demonstrated major transformation successes in core areas.
As this volume of stories, along with a previous collection ("In the Garden of the North American Martyrs") and a prize-winning novella ("The Barracks Thief") abundantly demonstrate, Mr. Wolff is a masterful storyteller, a natural raconteur, who is willing to take all sorts of technical risks.
The establishment of these in utero tobacco smoke effects depended not only on the size of the pooled data set, but also on the judicious selection of a control group, and should abundantly demonstrate the long-term benefits of publishing data in a form that allows for such a re-analysis.
Differential expression of several developmental genes abundantly demonstrates the existence of a distinct dorsoventral pattern across the hypothalamus, typically defining superposed longitudinal domains across both THy and PHy, which share given molecular markers (Shimogori et al. 2010; Puelles et al. 2012).
"The way people felt about him was demonstrated abundantly in the reaction to his death and the tributes from around the world.
In the MFA and BFA libraries, vitellogenin was the most abundantly expressed gene, which demonstrated higher expression levels in BFA compared to MFA.
