I understand; the hope is to achieve a pool of sources that have minimal bias individually AND whose overall biases cancel each other out. I.E. ideally we can

I understand; the hope is to achieve a pool of sources that have minimal bias individually AND whose overall biases cancel each other out. I.E. ideally we can find 50% of sources that are slightly right of center and 50% that are slightly left of center so they balance out. Does this seem more tractible?