Basically: How does one pursue the truth when direct engagement with evidence is infeasible?
I came to this question while discussing GMO labeling. In this case I am obviously not in a position to experiment for myself, but furthermore: I do not have the time to build up the bank of background understanding to engage vigorously with the study results themselves. I can look at them with a decent secondary education's understanding of experimental method, genetics, and biology, but that is the extent of it.
In this situation I usually find myself reduced to weighing the proclamations of authorities:
- I review aggregations of authority from one side and then the other--because finding a truly unbiased source for contentious issues is always a challenge, and usually says more about the biases of whoever is anointing the source "unbiased."
- Once I have reviewed the authorities, I do at least some due diligence on each authority so that I can modulate my confidence if a particular authority is often considered partisan on an issue. This too can present a bias spiral checking for bias in the source pillorying the authority as partisan ad infinitum.
- Once I have some known degree of confidence in the authorities of both sides, I can form some level of confidence in a statement like: "I am ~x% confident that the scientific consensus is on Y's side" or "I am ~Z% confident that there is not scientific consensus on Y"
That's technically true, but it misses my point.
Suppose I buy some bread. The label will list "wheat" as an ingredient. There are many varieties of wheat with various genetic differences between them, produced in part by directed breeding. The label won't say which variety was used, unless the genetic engineering was done by a particular set of modern technologies, in which case it must say it's GMO.
Clearly, to benefit the customer, the label should list (classes of) genotypical and phenotypical variations, perhaps only those that have been deemed legal-but-potentially-dangerous. Listing the technology used to originally breed that variety is irrelevant, and feeds on a naturalistic fallacy (just like the term "organic food").
As an aside, all varieties of rice look different. My store stocks long, short, round, brown, red, etc. rice. I have no idea what, if any, the difference is. I wouldn't pay special attention to a new golden variety if it wasn't specially labelled.
It's true that if people want to know something - for whatever reason - then it's plausible for the government to mandate providing that information. This allows people to buy or boycott food to support various non-health/nutrition-related, but still important, causes.
On the other hand, I'd like government to support many endeavors that are beneficial for everyone as long as they remain secret, but would make people angry if they were widely known. For example, I might support nuclear power, which public opinion is generally against; so I don't want products to be labelled as 'made using electricity from nuclear power'.
I feel that in these subjects, like nuclear power, GMOs and organic food, the mainstream public opinion is for or against them not just because it's misinformed on a factual level, but because people have real preferences for e.g. 'not eating unnatural food' even if they believe it's good for your health.
(Btw, I don't know much about this, but one difference about rices is their starch structures. Different starches hydrolyze to various extents when you cook them, which seems to me to at least matter calorically (the amounts of washed out saccharides will not be the same). I mention this since it's already a "continue this thread", so less likely to distract people.)