Working Memory is the cognitive system responsible for temporarily holding and processing information. Unlike Long-Term Memory (which is effectively infinite), Working Memory is strictly limited in both capacity and duration . It acts as the biological "bottleneck" through which all new learning must pass before it can be consolidated.

The most famous finding in cognitive psychology, established by George Miller (1956), posits that the average human can hold approximately $7 \pm 2$ "chunks" of information at once .

When a learner attempts to process too many novel elements simultaneously—such as trying to memorize a long vocabulary list while also decoding complex syntax—this capacity is quickly overwhelmed. Cowan (2001) suggests that for novel information (like a new language), this limit may be even lower, closer to 4 chunks.

According to John Sweller (1988), the originator of Cognitive Load Theory, exceeding this capacity triggers Cognitive Overload. When overload occurs, the processing of information stops, errors increase, and the transfer of information to long-term storage is inhibited . This explains why "binge-learning" yields diminishing returns: once the working memory buffer is full, additional study time is wasted.

We respect this biological bottleneck through two specific design choices:

1. Session Limits: We recommend sessions of 20–45 minutes to prevent overload fatigue and respect the limits of attention.

2. Chunking: We break complex sentences into smaller grammatical "chunks" to keep the active elements within the $7 \pm 2$ limit .

1. Miller, G. A. (1956). The magical number seven, plus or minus two: Some limits on our capacity for processing information. Psychological Review, 63(2), 81–97.

2. Sweller, J. (1988). Cognitive load during problem solving: Effects on learning. Cognitive Science, 12(2), 257–285.

3. Cowan, N. (2001). The magical number 4 in short-term memory: A reconsideration of mental storage capacity. Behavioral and Brain Sciences, 24(1), 87–114.