3 types of readiness required of critical thinkers

In the article Bertrand Russell on Critical Thinking, author William Hare describes the willingness or readiness that Russell says one must adopt to engage in critical thinking:

• a readiness to admit new evidence against previous beliefs, which involves an open-minded acceptance (avoiding credulity) of whatever a critical examination has revealed;
• a readiness to discard hypotheses which have proved inadequate, where the test is whether or not one is prepared in fact to abandon beliefs which once seemed promising; and
• a readiness to adapt oneself to the facts of the world, which Russell distinguishes from merely going along with whatever happens to be in the ascendant, which might be evil.