What's inside the apartment: The apartment consists of a bedroom, kitchen, living room, and bathroom. 
In the bedroom, there is a coffee table and a desk, with a dish bowl placed on the coffee table. 
The kitchen is equipped with four cabinets, a fridge, a kitchen table, a microwave, and a stove. The first and third cabinets are empty, while the second cabinet contains an apple. The fridge houses a plate and two salmons. A cupcake can be found in both the microwave and the stove. The fourth cabinet stores a wine glass and a bottle of wine. 
The living room features a cabinet, a sofa, a coffee table, and a desk. The cabinet is filled with four water glasses, a bag of chips, an apple, a condiment bottle, and a wine glass. Two remote controls rest on the coffee table. 
Lastly, the bathroom contains a cabinet, which is currently empty. 
Actions taken by William: William is situated in the bedroom. He proceeds to the kitchen, makes his way to the third cabinet, opens it, and subsequently closes it. He then navigates towards the first cabinet, opens it, and closes it as well. Following this, he heads to the fourth cabinet, opens it, and then closes it. Finally, he strides towards the fridge, preparing to open it. 
Question: If William has been trying to get a salmon, which one of the following statements is more likely to be true? (a) William thinks that the salmon is not inside the fridge. (b) William thinks that the salmon is inside the fridge. Please respond with either a or b.