In her 2015 book Proba the Prophet, Cullhed counters Shanzer's claims, first by noting that there is no definitive evidence that Faltonia Betitia Proba died in AD 351 and that such an assertion remains speculative at best.
Dalam buku buatannya tahun 2015 Proba the Prophet, Cullhed menentang klaim-klaim Shanzer, mula-mula menyatakan bahwa tak ada bukti definitif bahwa Faltonia Betitia Proba meninggal pada 351 dan anggapan semacam itu masih sangat spekulatif.