全像原理的靈感來自於黑洞熱力學,黑洞熱力學推測任何區域的最大熵數與半徑平方呈比例關係,而非半徑立方。全像原理觀點認為:所有落入黑洞的物體資訊內容可能會被完全包含在事件視界的表面漲落。在弦論的架構下,全像原理為黑洞資訊悖論提供了解答。[6] 然而,有一些愛因斯坦場方程式的古典解允許熵值大於面積定律所允許的範圍,因此原則上也大於黑洞所具有的熵值。這情形被暱稱為「惠勒的金袋子」(Wheeler's bags of gold)。這些解的存在與全像原理相左,而它們對包含全像原理在內的量子重力理論所造成的影響仍未被全然理解透徹。[7]
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