Moral Obligation to Research?

In response to Kurtiss - full post here

This is a very interesting concept. I cannot tell if I agree with the idea and/or the sentiment. It seems to me that this conclusion and moral imperative would extend to more than vegetarians who maybe should be vegans. I think this would also extend to meat-eaters, if we accepted it; meat-eaters are morally responsible for determining how their food comes to their plates.

In many ways finding compelling evidence in favour of veganism is much more difficult than finding evidence for vegetarianism. So, any obligation that vegetarians have to search for reasons to be vegan would certainly apply to meat-eaters, since it would be easier to find information on vegetarianism.

Still, I am not sure how morally obligatory it is to know or research various activities in which one might be engaged; people engage in many activities during the day, and they are often busy with many things. So how should one decide what to look up? What if the thought honestly never occurs to them?