Witness credibility may be impeached through character evidence, corrupt inducement, or admissible prior inconsistent statements.

Section 155 permits impeachment of a witness's credit through character evidence from persons acquainted with the witness, proof of bribery or other corrupt inducement, and prior inconsistent statements on matters capable of contradiction. A credibility witness cannot state reasons during examination-in-chief, though those reasons may be explored in cross-examination. The answers cannot be contradicted, but false answers may lead to a charge of false evidence.

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