They do a variety of things based on professionalism, budget, ability to gauge that.
My point is --> this problem is the most basic and fundamental problem that is the focus of every pollsters existence <--
Asking questions is extremely easy.
Getting a 'truly random sample' is extremely hard.
Trying to factor in those things is 100% of the work, that's what they do, it's their job.
Some are better, some are lazier, some have better data, some are individuals, some are teams so it varies hugely.
When the conditions are controlled they'll have a better idea than otherwise.
Their job is not 'asking questions' it's 'figuring out how to get random samples'.
My point is --> this problem is the most basic and fundamental problem that is the focus of every pollsters existence <--
Asking questions is extremely easy.
Getting a 'truly random sample' is extremely hard.
Trying to factor in those things is 100% of the work, that's what they do, it's their job.
Some are better, some are lazier, some have better data, some are individuals, some are teams so it varies hugely.
When the conditions are controlled they'll have a better idea than otherwise.
Their job is not 'asking questions' it's 'figuring out how to get random samples'.