"Keynes' (1936) investment multiplier" (KIM) theory has acquired the "endless free play" of its criticisms. More recent criticism against it has been disclosed by Ahiakpor (2001). Among the tally of criticisms, this article is a "new password" in the sense that despite Ahiakpor's (2001) criticism, further inconsistencies are still embedded in the KIM theory. The objectives of the present paper are threefold: (i)to correct the strangely persistent three propositional inconsistencies in the KIM theory, which were overlooked by the previous authors including Ahiakpor (2001), (ii)to suggest that few charges of Ahiakpor (2001) against the KIM theory are not adequate with respect to the comments of other authors, and (iii) to demonstrate that Ahiakpor's (2004) criticism is not confined to the "contribution," rather, it encompasses both the "contribution" and the "contributor," which is a denial of "irreducible moral values of humans".

1. Ahiakpor, J. C. W. (2001). On the mythology of the Keynesian multiplier: Unmasking the myth and the inadequacies of some earlier criticisms - Focus on economic theory - John Maynard Keynes. American Journal of Economics and Sociology, 60 (4), 745-773.
2. Ahiakpor, J. C. W. (2004). On the future of Keynesian economics: Struggling to sustain a dimming light. American Journal of Economics and Sociology, 63 (3), 583-608.
3. Aschheim, J., & Tavlas, G.S. (1999). On the analytics of Wicksell: A comment on Abiakpor. American Journal of Economics and Sociology, 58 (3), 468-471. DOI: 10.1111/j.1536-7150.1999.tb03298.x
4. Coddington, A. (1976). Keynesian economics: The search for first principles. Journal of Economic Literature, 14 (4), 1258-1273.
5. Coddington, A. (1983). Keynesian economics: the search for first principles. London: George Allen & Unwin.
6. Dalziel, P. C. (1996). The relevance of Keynesian multiplier process after sixty years. History of Economics Review, 25 (Winter-Summer), 221-231.
7. Ebeling, R. M. (1999). Knut Wicksell and the classical economists on money, credit, interest and price level: A comment on Ahiakpor. American Journal of Economics and Sociology, 58 (3), 471-479.
8. Gnos, C., & Rochon, L-P. (Eds.) (2009). The Keynesian Multiplier. London: Routledge.
9. Gootzeit, M. J. (1999). Wicksell vs. the classics on the mechanics of the quantity theory: A Comment on Ahiakpor. American Journal of Economics and Sociology, 58(3), 481-486.
10. Humphrey, T. M. (1999). Exonerating Wicksell: A comment on Ahiakpor. American Journal of Economics and Sociology, 58 (3), 459-465.
11. Keynes, J. M. (1936). The general theory of employment, interest and money. London: Macmillan.
12. Moore, B. (2006). Saving is never a constraint on investment. South African Journal of Economics, 74 (1), 15. DOI: 10.1111/j.1813-6982.2006.00044.x
13. Nallari, R. & Mba, L. N. (2010). Rethinking multipliers in a globalized world. Policy Research Working Paper No. 5277, Growth and Crisis Unit, World Bank Institute (<a href=http://econ.worldbank.org target="_blank">http://econ.worldbank.org</a>). DOI:10.1596/1813-9450-5277
14. Stigler, G. J. (1955). The nature and role of originality in scientific progress. Economica, 22 (88), 293-302.
15. Syed, N. I., Tahir, M. S., & Sahibzada, S. A. (2011). Measuring the impact of multiplier to determine the Keynesian model of income in open economy in the context of Pakistan. African Journal of Business Management, 5 (17), 7385-7391. DOI: 10.5897/AJBM11.109
16. Ulmer, M. J. (1952). Autonomous and induced investment. American Economic Review, 42(4), 587-589.
17. Wilkie, T. (1993). Perilous Knowledge. London: Faber.