They will criticize the research with hired 'thought leaders' and point to the 'overwhelming evidence' that proves GMOs and roundup is safe.
You can't prove with absolute certainty that any food is safe, only what the risks are.
And yes there is a lot of real scientific and independent evidence that GMOs are no more risky than other foods.
http://www.skepticalraptor.com/skepticalraptorblog.php/the-s...
‘substantially equivalent’ is a proxy for food safety and it's also a tricky standard. When interpreting this study's results the public and policy makers will look to academics:
http://www.nytimes.com/2015/09/06/us/food-industry-enlisted-...
Just by selectively funding academics that agree with them they can distort the debate.