That dreams can be memorized and recalled is a matter of everyday observation and common knowledge, forming the basis of standard psychological study without requiring individual citations.
The claim that dreams can be memorized and recalled is a trivial matter of direct everyday observation and human experience. While numerous sleep and memory studies discuss dream recall as a variable or mechanism (e.g., papers 1, 3, 7, 9), the foundational fact that dreams are experienced and can be remembered does not require empirical proof or citation. Therefore, Step 0 classifies this as common knowledge.