The imaging methods turn out to be complicated to perform and can produce murky results that are difficult to interpret.
As for the scientific studies, they are difficult to perform and more difficult to interpret and explain to the public.
Having grown nearly blind, Mr Wahid finds it difficult to interpret information and has anyway shown little interest in policy detail.
There are a variety of other questions asked about specifics in Florida, and those are a little more difficult to interpret.
" Of course, a rebuttal from the Mobile Operators Association said otherwise: "The findings related to tumor location are difficult to interpret.
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Many of the experiments that appear to provide evidence of an effect are flawed, subject to experimental error, or are difficult to interpret.
However, one-off factors make the data difficult to interpret.
"While such studies are difficult to interpret and apply directly to the Scottish context, they do suggest that there can be a link between corporation tax and economic growth, if used wisely".
The panel also noted that the "evidence suggesting very clearly that the analyitcal results reported by DCC (Drug Control Centre, Kings College London) in connection with the A sample were difficult to interpret".
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The results from the current trial, which will be presented at the annual meeting of the European League Against Rheumatism in May, are difficult to interpret because the number of patients who received a placebo is much smaller than those who got tofacitinib.
Before discussing the entries, it is worth noting that the table itself had a number of problems which made it difficult for readers to interpret the data.
And the vets said that popular horror of the seal hunt seemed to be based largely on emotion and on images that are difficult even for experienced observers to interpret.
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