How do we know Lazarus was truly dead?

The account of Lazarus in John 11 provides clear evidence of his physical death. The narrative explicitly states that Lazarus had been in the tomb for four days (John 11:17). This detail is crucial, as Jewish tradition held that the spirit of a deceased person lingered for three days, thus establishing Lazarus's condition beyond any reasonable doubt. Jesus's raising of Lazarus after this period not only showcased His divine authority over life and death but also served as a powerful testament to His identity as the Son of God.