Method drawoval's arguments specify the upper-left and upper-right corners of the oval. the upper-left corner, scale and size of the oval. the position and size of the bounding rectangle for the oval. the position and size of the bounding cycle for the oval.

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evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.