I think wine tasting is a generally a good analogy to listening tests.
And in both cases, people selectively choose the evidence to suit their beliefs.
Of course bias will come into the equation in sighted tests. I don't think anyone at all would dispute that.
But blind testing has its own flaws, which supporters "blindly" ignore.
Like the test I read about when blind tasters couldn't tell the difference between cognac and whiskey.
Like the time when professional wine tasters (for a wine magazine) were secretly given the same bottle of wine at two different tastings. In the first event, the bottle came near top. In the second event, it came well down the rankings and with completely different tasting notes.
That doesn't mean that blind testing has no value, but you need to accept the pitfalls for it to be useful.
If you compare a randomly expensive wine with a randomly cheap one, you'll get a random result - just like hifi.
But a carefully chosen expensive wine will ALWAYS beat a carefully chosen cheap wine - just like hifi.
The cheap wine may well be better value, but never a better absolute taste.
Of course, personal preference also comes into it - just like hifi. If you hate dry wines, then you may well prefer a cheap sweet wine to an expensive dry one.
Blind tests can easily spot certain taste differences, such as level of tanin. Just like listening tests can easily spot frequency differences in headphones.
But when comparing two wines which have the same tannin level, dryness, grape variety etc, blind tests are an unreliable way of choosing which is best, just like for neutral hifi components like DACs and cables.
And in both cases, people selectively choose the evidence to suit their beliefs.
Of course bias will come into the equation in sighted tests. I don't think anyone at all would dispute that.
But blind testing has its own flaws, which supporters "blindly" ignore.
Like the test I read about when blind tasters couldn't tell the difference between cognac and whiskey.
Like the time when professional wine tasters (for a wine magazine) were secretly given the same bottle of wine at two different tastings. In the first event, the bottle came near top. In the second event, it came well down the rankings and with completely different tasting notes.
That doesn't mean that blind testing has no value, but you need to accept the pitfalls for it to be useful.
If you compare a randomly expensive wine with a randomly cheap one, you'll get a random result - just like hifi.
But a carefully chosen expensive wine will ALWAYS beat a carefully chosen cheap wine - just like hifi.
The cheap wine may well be better value, but never a better absolute taste.
Of course, personal preference also comes into it - just like hifi. If you hate dry wines, then you may well prefer a cheap sweet wine to an expensive dry one.
Blind tests can easily spot certain taste differences, such as level of tanin. Just like listening tests can easily spot frequency differences in headphones.
But when comparing two wines which have the same tannin level, dryness, grape variety etc, blind tests are an unreliable way of choosing which is best, just like for neutral hifi components like DACs and cables.