According to the theory of fuzzy control, we research the stepped and avoiding obstruction of the robot.

并结合模糊控制理论，对机器人的行走和避障行为进行了研究。

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But after listening carefully to both sides and, most importantly, reviewing the words of the witnesses themselves, they did not prove their theory of perjury and obstruction of justice beyond a reasonable doubt to me.

CNN: Sen. Murray's closed-door impeachment statement

Under this theory, a president's obstruction and perjury must involve concealment of official actions.

CNN: Transcript: Judiciary Committee impeachment hearing

Unfortunately, like so much of the obstruction case, the facts do not bear out this convenient theory.

CNN: Transcript: White House Counsel Ruff's opening statement