A Mg line at 5183 Å (top plot) and a Ca line at 6162 Å (bottom plot) from SDSS J234723.64+010833.4 (solid line), and HD 122563 (long dashed line). HD 122563 has an [Fe/H]=−2.6 and relatively normal [α/Fe]~ 0.2. SDSS J234723.64+010833.4, which has [Fe/H]  = −3.17 should have weaker noticeably weaker lines if this were a typical [α/Fe] enhanced MP star. However, while the Mg is clearly weaker, the Ca line is actually stronger relative to the same line in HD 122563.