The defense team of former outfielder for San Francisco Giants Barry Bonds asked a federal judge to dismiss the perjury charges against him in a 31-page motion filed in the San Francisco Federal Court on Wednesday. The reason - some parts of the charging documents are so vague that it is impossible to establish what truths Bonds may have uttered.

Bonds, 43, was indicted on four counts of perjury and one count of obstruction of justice after being involved in performance-enhancement drug abuse scandal. The federal prosecutors accused him of lying in his testimony 5 years ago, but his lawyer, Allen Ruby, dismissed the accusations as imprecise, ambiguous and redundant.

The scandal Bonds is involved in broke in 2003, when he claimed he was not aware that the drugs he got from former trainer Greg Anderson were steroids. Anderson pleaded guilty for his involvement in the BALCO case and was sent to jail for several months. Later he went back to prison after he refused to testify against Bonds, on contempt charges.

The defense team for Bonds motivated it was impossible to prepare a defense as many of the duplicitous allegations are simply too vague and confusing. “Bonds is entitled to clear notice of the unambiguous falsehood he is accused of telling the grand jury,” his lawyer said in the filing.

The motion added: “Even Barry Bonds cannot be expected to make contact with a fastball, slider, and knuckler thrown at him simultaneously. Permitting the present indictment to stand in its present form will prejudice Mr. Bonds’ ability to defend against the government’s accusations in this serious matter.”

According to the filing, the prosecutors should maintain a single false statement per count or remove it, and moreover, to specify what exactly the obstruction of justice charge refers to. The U.S. District Judge Susan Illston will rule the verdict in a month’s time, on February 29.