I am trying to figure out why we need an evidence based approach and medical statistics . Or how best to explain it someone who is more convinced by anecdotes and personal experiences. Or why did things like blood letting lasted for almost 2500 years.
Here are some of the major reasons I think:
1. Cognitive bias and heuristics - We easily make errors because that's how we are designed. This could be the form confirmation bias, availibility heuristic, representative heuristic and so forth.
2. Random Variability: Random variability is inherent in every biological response. A few who smoked died at an early age while a few who smoked lived till 80 or 90. The only way to figure if there is an actual difference or if this is just due to random variation is by looking at large sample sizes and using proper statistics.
Did I miss anything important?
Thank you so much!