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Even for the observed luminosity distance D_L(z), which suggests theexistence of dark energy, we show that an inhomogeneous dust universe solutionwithout dark energy is possible in general. Future observation of D_L(z) for 1\lesssim z < 1.7 may confirm or refute this possibility.Comment: 10 pages, 6 figures, Prog. Theor. Phys. in pres

Is Dark Energy the Only Solution to the Apparent Acceleration of the Present Universe?