3. What are conventional symbols? Why are they needed?
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* Symbols are necessary to speculators to disguise the fact that every difference claimed by those who use them contains a “fudge” factor. In other words a difference always falls within a high and a low tolerance, since nothing arrived at subjectively is exact. By using symbols you can just throw away the variations that exist for all differences and go on your merry way to solve what would otherwise be impossible conclusions.
* Conventional symbols are widely accepted signs or sign systems which signify an idea or concept. They represent different features on a map and are not drawn to scale. They are important because: .. Symbols can be used to depict features like cities, roads and railways.