"substantiate the notion" is a correct and commonly used phrase in written English.
It means to provide evidence or support for an idea or concept. Example: The scientist conducted multiple experiments to substantiate the notion that exercise can improve cognitive function in older adults.
Luxury companies and consumers' increasing attention and commitment toward environmental issues substantiate the notion that luxury and sustainability are compatible concepts.
Documenting changes in the structure of anatomical networks for this population would substantiate the notion that the brain's core network-level organization may undergo neuroplasticity as a result of life-long experience.
There is reason for skepticism, particularly after reports that the group had developed its own paper currency earlier this year were quickly debunked — but a statement that emerged Thursday that is said to have been issued by the terrorist group's treasury appears to substantiate the notion.
These results support, and further substantiate the notion that heparanase function is not limited to its enzymatic activity.
In addition, our data also substantiate the notion that regulated nucleocytoplasmic trafficking of rpL10 links the antiviral response to receptor activation.
Collectively, these results further substantiate the notion that relocation of rpL10 to the nucleus links the antiviral response to receptor activation.
This substantiates the notion that XTβIIR cDNA can act as a receptor for TGF-β.
That the United States government, and Thomas L. Friedman in his column, pick on North Korea and Iran and ignore India, Pakistan and Israel substantiates the notion that the whole fuss is not about world security but about consolidating United States hegemony.
In addition, it further substantiated the notion that it will be possible for agricultural development agencies to achieve greater success when they co-operate with farmer organisations (Verteeg and Koudokpon, 1993).
Its predicament substantiates the notion that a BHP-Rio Tinto deal would be disadvantageous to Chinese steel makers, feeding heavy speculation last fall that Baosteel might offer a counterbid for Rio Tinto.
This substantiates the notion that, to effectively reduce the TB transmission among the San Francisco homeless, the TB surveillance efforts would have to be coupled with those of HIV.
