The American philosopher W. V. O. Quine, in his "Two Dogmas of Empiricism", famously challenged the distinction, arguing that the two have a blurry boundary.

Scholars like Jeffrey Rubenstein and Daniel Boyarin argue that it was through the Yeshu narratives that Rabbis confronted this blurry boundary.

"There are all these blurry boundaries," she said.

Even the band has blurry boundaries; halfway through a song, the tenor sax player hands his instrument to a man sitting on the sidelines.

Traversing these blurry boundaries is what excites a director like Lisa Peterson.

But the last two weeks, Mr. Niemetz has been at the center of a renewed debate about the blurry boundaries in Germany between journalists and their outside money-making practices.

The blurry boundaries are not limited to television journalism.

Rauschenberg's Combines explored the blurry boundaries between art and the everyday world.

The sometimes blurry boundary between the Rabbis and early Christians provided an important site for distinguishing between legitimate debate and heresy.

At the heart of the conflict are legal issues about the blurry boundary between unlawful plagiarism and legitimate critical reinterpretation.