"insufficient foundation" is a correct and usable phrase in written English.
It is typically used to describe a situation where there is not enough evidence or support to justify a certain conclusion or action. Example: The defendant's lawyer argued that the case should be thrown out due to insufficient foundation for the charges against his client.
As part of the captain's defense at a sentencing hearing, his lawyer, Steven Brounstein, said any inconsistencies were an insufficient foundation on which to build a murder case.
But the memo, as reported by Charlie Savage in The Times, is an insufficient foundation for a momentous decision by the government to kill one of its own citizens, no matter how dangerous a threat he was believed to be.
Critical consideration of all possible causes including aerodynamic effects supplemented by a causal (Bayesian) network finally resulted in identification of the most significant causes including insufficient foundation and overall stiffness of temporary supports.
Structures are often raised wherever they can fit; some buildings were built on slopes with insufficient foundations or steel supports.
Instruments specific to palliative care tend to measure care quality from relative perspectives or have insufficient theoretical foundation.
For complex diseases like cancer, traditional methods of targeting a single protein is found profoundly insufficient laying the foundation for polypharmacological and combinatorial analysis harnessing in silico techniques viz.
These assumptions are insufficient in cases where the foundation may have a unilateral stiffness that vanishes in compression or tension such as in non-pneumatic tires and bushing bearings.
The complex mining geological condition, backward technology and equipment, insufficient skills of miners, and weak safety foundation are the fact that does not dispute for the bad coal mine safety situation in China.
There were also protests, Mr. Starr recounts, that "the Bridge was too costly, tolls would prove insufficient to redeem taxpayer-backed bonds, the geological foundations for the south pier were inadequate".
Although correlative data alone are insufficient to establish causality, these data form a critical foundation of knowledge that can be used to guide and inform future manipulative experiments.
Unfortunately plain-pipe grouted connections for large-diameter monopile foundations have recently exhibited clear signs of insufficient axial capacity, resulting in slippage between the transition piece and monopile.
