The phrase "are insufficient because" is correct and usable in written English.
It can be used to explain the reasons why something does not meet a certain standard or requirement.
Example: "The resources provided are insufficient because they do not cover all the necessary topics for the project."
Alternatives: "are inadequate due to" or "fall short because".
"Discounts for selected customers without lowering the overall price of EpiPens are insufficient, because the excessive price will likely be passed on through higher insurance premiums," he said.
Whereas psychological explanations of war contain much that seems to be valid, they are insufficient because man behaves differently in different social contexts.
Existing geostatistical methods are insufficient because these typically have been developed for situations in which there is no auxiliary information.
However, the findings are insufficient because redox reaction by oxygen ion drift occurs beneath the top electrode, and it is difficult to analyze with a nondestructive method.
However, cellular infiltration and vascular ingrowth are insufficient because of lack of macropore interconnectivity in electrospun scaffolds with high-fiber density.
However, the detection and the false positive rates of PFMPF are insufficient because the probability table P x, y, GreyValue) is inaccurate when a mask covers the face.
But such a strategy, he said, is insufficient because "it leaves the network behind the attacks virtually untouched".
Even if he had made the visits, she said, they would have been insufficient, because biweekly visits were required.
Your Oct. 28 editorial "Republican Zealotry" was insufficient because it did not explain House Republicans' deep reservations about the Senate's approach to airline security.
Mr. DenDekker said these instructions were insufficient because they did not detail where to find the holders or how to use them.
Other commentary on the new approach said the changes were insufficient because they failed to address the central issue — tolerance of the violence by rabbinic and other leaders.
