AS we inch closer to a clearer understanding of the products and practices that unleashed the credit crisis of 2008, it’s becoming apparent that those seeking the whole truth are still outnumbered by those aiming to obscure it. This is the case not only on Wall Street but also in Washington.

Truth seekers the nation over, therefore, are indebted to Senator Charles E. Grassley, Republican of Iowa, who in recent days uncovered what he called a government-enabled “TARP money shuffle.” It relates to General Motors, which on April 21 paid the balance of its $6.7 billion loan under the Troubled Asset Relief Program.

G.M. trumpeted its escape from the program as evidence that it had turned the corner in its operations. “G.M. is able to repay the taxpayers in full, with interest, ahead of schedule, because more customers are buying vehicles like the Chevrolet Malibu and Buick LaCrosse,” boasted Edward E. Whitacre Jr., its chief executive.

G.M. also crowed about its loan repayment in a national television ad and the United States Treasury also marked the moment with a press release: “We are encouraged that G.M. has repaid its debt well ahead of schedule and confident that the company is on a strong path to viability,” said Timothy F. Geithner, the Treasury secretary.