Researchers have resolved a longstanding issue in entanglement theory by demonstrating that the 14-qubit state Φ_{E8} is indeed entangled. This breakthrough was achieved by combining moment matrices, symmetric extension, and Lovász theta, thereby providing a definitive answer to a problem initially posed by Yu et al. in 20211. The solution involves a novel application of methods derived from quantum codes, which enabled the construction of an entanglement witness for Φ_{E8}. This witness serves as a mathematical proof of the state's entanglement, thus settling the question. The significance of this finding lies in its implications for the study of entangled systems and their potential applications in quantum computing and information processing. So what matters to practitioners is that this result contributes to a deeper understanding of entanglement and its role in quantum mechanics, ultimately informing the development of more sophisticated quantum technologies.