Examples:

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1a. Sally believes Bill is at her door because she hears his characteristic knock.

Bill being at the door causes Sally to hear that characteristic knock.

(The believed fact causes the evidential fact.)

evidential fact	causal relation	believed fact
----------	----------	----------
Sally hears the knock	<-- causes --<	Bill is at the door

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1b. Chris believes his car has an oil leak because he sees an oil stain on the driveway.

Chris's car having an oil leak causes Chris to see an oil stain on the driveway.

(The believed fact causes the evidential fact.)

evidential fact	causal relation	believed fact
----------	----------	----------
Chris sees the oil stain	<-- causes --<	The car has an oil leak