First, no causal connection.
The editorial implies that...however,the editorial provides no evidence to support this implication.
This argument depents on a series of four cause-and-effect relationships,
none of which the author has established.
The author must establish a clear cause-and-effect relationship between...and...
It is unfair to infer that the former is attributable solely to the latter.
Here the director might very well confuse cause and effect with mere correlation.
secondly, Insufficient-sample
The statistics from only a few recent years are not necessarily
a good indicator of future trends/hardly suffice to prove a clear trend.
Yet the mere fact that..does not necessarily mean that...
Thus,before I accept the editorial's conclusion,the author must show that...is representative of...
thirdly, based on a false analogy
With respects to the first of the two facts,
the author attempts here to draw what might amount to a false analogy between...and...
The authors analogy to ... is dubious at best.
fourthly, all things are equal
This argument suffers from a classic reasoning flaws:
what is true for one member of a group is also true for that group as a whole.
fifthly, Either-Or choice
In short,unless the editorial's auther explores and eliminates other options,
I remain unconvinced that...
sixthly, pool/report/survey is doubtful
A final problem with the editorial involves the possibility of additional results
from the survey-results that the editorial neclects to mention.
If the results turn out to be unreliable as aresult,
then any conclusion based on those results must be deemed unreliable as well.
The memo provides no evidence that the reports are reliable.
finally, gratuitous assumption
The speaker neglects to consider and rule out other explainations-for instance,
...Without eliminating other possible reasons for ...,the speaker cannot convice me that...
Besides, the author ignores the possibility that...
While this might be the case,the author must provide clear evidence to substantiat this assumption.
Yet it is entirely possible that...
The argument relies on the assumpution that ...