The quote you mentioned, "memory is the intelligence of the dumb," is often attributed to Albert Einstein. However, it is worth noting that there is some debate about the exact wording and origin of this quote.
In any case, the idea you propose about destroying past connections to make room for new connections relates to the concept of neuroplasticity. Neuroplasticity refers to the brain's ability to reorganize and form new neural connections throughout life in response to experiences, learning, and environmental changes.
While it is true that breaking old connections can potentially create space for new connections, it is important to understand that memory and intelligence are complex processes that involve more than just the physical connections between neurons. Memories are not solely stored in specific neural connections, but rather involve a distributed network of interconnected neurons and various brain regions.
Furthermore, the notion of "destroying" past connections can be misleading, as the brain's reorganization is a dynamic and ongoing process. The brain constantly modifies its neural connections based on the ongoing interplay between experiences, learning, and memory consolidation.
Rather than thinking of it as destroying past connections, it is more accurate to consider the brain's ability to adapt and reorganize itself by modifying existing connections and forming new ones. This adaptability allows for learning, acquiring new skills, and the integration of new information into existing cognitive frameworks.
In summary, while creating space for new connections and neural adaptations is an essential aspect of learning and neuroplasticity, the relationship between memory, intelligence, and the brain's neural connections is multifaceted and complex.