1. The groundlessness of their report was quickly recognized.

2. A thorough examination proves the groundlessness of arguments supporting......

3. Man is puzzled by the groundlessness of his choices and struggles in nothingness-all his life he is struggling for being-for-itself freedom from being-in-itself freedom.

4. Turbulence, uncertainty, ambivalence, exhilaration, fear, loss, groundlessness, falling, guilt, error ... these are a few of the overlaid feeling tones I explore.

5. Basic on it, the author discusses the problems on the nature of groundlessness of the activity of play, the acceptance for the rules of it , as well as the player.