Legal Definitions - firsthand knowledge

Firsthand knowledge is a type of personal knowledge gained through direct observation or experience. It is different from knowledge based on what someone else has said or written.

• A witness who saw a car accident has firsthand knowledge of what happened.
• A scientist who conducts experiments and collects data has firsthand knowledge of the results.
• A person who has traveled to a foreign country has firsthand knowledge of the culture and customs there.

These examples illustrate how firsthand knowledge is gained through personal experience or observation, rather than through secondhand sources like books or hearsay.