Bias is unavoidable, but definitely reducable. Biases are the least harmful when they are well understood. The problem with just haphazardly collecting anecdote

Bias is unavoidable, but definitely reducable. Biases are the least harmful when they are well understood. The problem with just haphazardly collecting anecdotes is that the biases tend to be poorly understood becuase the collection protocol is inconsistent and poorly documented.