## Their results or conclusions

X’s explanation depends on or relies on …

The evidence for … is inconclusive

The reasoning here is problematic

the conclusions are somewhat weak

X’s arguments … are unconvincing

this, however, holds only for …

the claim or argument that … simply does not hold water

… is not sufficient argument for the existence of etc. …

this assumption is rather arbitrary, however

X’s main assumption that … is debatable or problematic

We would dispute X’s conclusion that …

X’s explanation for or of … is rather or highly speculative

this contradiction has also been pointed out by X

an error in the calculation

X’s figures, results, conclusions etc. should, however, be treated with caution

The results should be treated with a degree of or some or considerable caution

X’s conclusions would carry more weight if …

further clarification of … is required

X and Y fail to explain …

the causal relationship between … and … needs to be clarified

a number of valid criticisms

… violates the principle of …

This invalidates, however, …

X’s argument rests or depends almost entirely on …

X’s statement or theory etc. … requires some qualification

X gives a detailed if not always tenable analysis of …

X attempts, unsuccessfully in my or our view, to …

Where X’s argument or explanation falls down is in …

X’s explanation is not implausible, if not entirely satisfactory

Further research is necessary to establish a clearer relationship between … and …

Further research is necessary before ascribing … to …

A more complete explanation of … would …

a simplistic assumption

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