The phrase "cannot fully guarantee" is grammatically correct and can be used in written English.
It can be used to express a limitation or uncertainty in a statement. Example: Despite our best efforts, we cannot fully guarantee that the project will be completed on time.
However, it said: "We cannot fully guarantee that there isn't a slight increased risk of supporters being open to fraud.
A spokesperson told Japanese newspapers Konami cannot fully guarantee safety for the large number of participants expected.
Of course, such schemes cannot fully guarantee that a node can be trusted but they assist in automatically exclude some of the malicious, misbehaving or selfish peers from joining the network.
However, such assurances cannot fully guarantee accurate reporting.
Identical discontinuous peptides on B-cell epitope alone cannot fully guarantee the same neutralization result.
First, the DSP and MCMS systems are all based on surveillance points; even the use of advanced sampling methods cannot fully guarantee representativeness of the data.
The role of the recently established Ethics Advisory Group is to provide the ethical guidance, and it acknowledges that "irreversible de-identification of whole genome sequence cannot be fully guaranteed for technical reasons".
In exchange, the Nets agreed to fully guarantee the $12 million he is owed in 2014-15.
Yet he cautioned that the additional investment could never fully guarantee against frauds.
Instead, governments should fully guarantee all bank deposits — and impose much tighter restrictions on risk-taking by banks.
Just a few years ago, the European Commission said that countries should fully guarantee deposits up to that amount.
