Is your opinion based on your perception or actual data?
My career, initially in R&D and culminating in technology consultancy around the world, has taught me that data shouldn't be ignored and that perception can often discolour reality. Of course data can occasionally be corrupted or insufficient, leading to false conclusions. And more often it can be misinterpreted, with resultant errors in reaction. But mostly it’s the most reliable means of assessment.
People believe that perception is reliable and that what they perceive reflects objective reality. Philosophers will argue about this belief at a level way beyond my understanding, but from my scientific viewpoint the level of reliability must be founded on degrees of knowledge. Bearing in mind the old adage of a little knowledge being a dangerous thing, the reliability of perception has to be challenged.
Perception, gut-feelings, or whatever are fine - as long as they are supported by factual data. Understandably, people will often criticise data as being selectively published to support an ideology - something that happens a lot. But without some form of concrete evidence, how can we make reliable judgements? At least data can be checked and challenged. Perceptions are without substance and so can only be challenged with acceptable data. Those with strongly believed perceptions will never accept data that challenges their beliefs.
Consequently, the following is unlikely to change any views expressed in this thread. But I’ll put it out there anyhow.
Despite recent improvements in air quality in London, all locations monitored in 31 boroughs are exceeding global WHO recommended limits for deadly nitrogen dioxide. In total, 14 boroughs have five or more locations monitored that also exceed the less stringent UK legal limit for nitrogen dioxide. In Brent, Croydon and Merton, more than a quarter of the locations monitored found the air to be breaching legal limits.
Many will no doubt say that this is all rubbish because it’s information put out by the Mayor of London. All that I’ll consider an acceptable argument against is real data that contradicts these results.
New analysis of diffusion tubes at locations across the city, which has been compiled by City Hall has, today revealed that whilst some progress has been made improving air quality in the capital, every London borough is breaching World Health Organization (WHO) guidelines for nitrogen dioxide.
www.london.gov.uk