Final answer:
Tacit knowledge refers to knowledge that is difficult to articulate or transfer to another person. Functionalist theory suggests that we have tacit knowledge of our own mental states.
Step-by-step explanation:
Tacit knowledge refers to knowledge that is difficult to articulate or transfer to another person. It is often subconscious and obtained through experience and practice rather than explicit instruction. In the context of mental states, the Functionalist theory suggests that we have tacit knowledge of our own mental states. This means we have a direct, non-inferential access to our own thoughts, feelings, and sensations.