Rudy Giuliani, President Trump’s most prominent personal lawyer, on Monday sought to clarify his assertion that “truth isn’t truth” after he was criticized for using that phrase to explain why the president risked falling into a possible “perjury” trap if he were interviewed by special counsel Robert Mueller.

“My statement was not meant as a pontification on moral theology but one referring to the situation where two people make precisely contradictory statements, the classic ‘he said, she said’ puzzle,” Giuliani wrote on Twitter Monday. “Sometimes further inquiry can reveal the truth other times it doesn’t.”