This document discusses explanations for forgetting, specifically retrieval failure due to the absence of cues. It explains that while information is stored in long-term memory, we can forget due to an inability to retrieve it without cues. Cues can be external contextual details or internal state-dependent details associated with the initial learning that help with recall. The encoding specificity principle holds that cues present during learning must also be present during retrieval attempts. A lack of cues results in cue-dependent forgetting.