Buying a Telegraph at Euston yesterday, was offered a free bottle of Buxton water. Bored on the train, read the label. 'Rain fell on the Peak District 5000 yrs ago' etc etc. Label on the bottle said 'use by date 2011'. Am I missing something?
Yes,you're forgetting that for 5000 years the water has been a mile deep in the ground, free from contact with the air, and filtered through the underlying limestone. When it emerges from its source it contains no micro-organisms.
Once it comes into contact with air and light it behaves like any other water. It will cease to be microbiologically pure and will become stagnant if left for too long.
Knowing Buxton and the surrounding 'caving' areas, I am fully acquainted with the water,both underground and above. But I would still prefer the free mouthful from the monumental tap near the Pavilion/ Opera House, than the bought or store shelf stuff.
Actually a huge amount of the information that comes up in Google search returns is rubbish, but lots of people think that because something is found via Google it must be true.
In the same way, lots of people think that everything in Wikipedia is fact, but of course huge amounts of that is rubbish too.
The secret of being knowledgeable - apart from being intelligent enough to understand things when you come across them - is to read widely, so you develop a sense for what sounds right and what doesn't. Simply acquiring knowledge isn't enough - you have to know how to apply it.
Almost everyone can have an opinion about most things after a couple of minutes with Google, but having an informed opinion is another thing altogether. That requires a little more in the way of background knowledge. Experience helps, too.