they may be baised
they may be biased
By testing.
how much wood could a wood chuck chuck if a wood chuck wood chuck could
after it has been evaluated and tested repeatedly
As more and more data is collected and evaluated on a topic, scientists' theories or hypothesis may change based on the new information.
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased