dis•be•lief dĭs″bĭ-lēf′►
n. Refusal or reluctance to believe.
n. Positive unbelief; the conviction that a proposition or statement for which credence is demanded is not true.
n. A negation or denial of the truth of some particular thing.

NOT believing a claim requires NO "faith".

It certainly does depending on the claim.

"Faith" is NOT a component or function of DISBELIEF.

Positive unbelief; the conviction that a proposition or statement for which credence is demanded is not true.

Can you prove your claim? "the conviction that a proposition or statement for which credence is demanded is not true"..............'Conviction', without Evidence....Yet breathing, alive, with life.