With no pre-written script, Canon challenged Stone to create a short film by crowdsourcing inspiration.
The most influential, arguably, was the first intifada, or uprising, where the image of Palestinian children armed only with stones challenging Israeli tanks and soldiers reversed many (though clearly not all) of the West's false assumptions regarding Israel: No longer would Israel be the heroic David under assault by an Arab Goliath.
And although the hefty, largely interred stones were challenging to remove, landowners still occasionally uprooted them.
It's called "peeler" granite because it peels off the top of the bedrock, alleviating the need to quarry, and the irregular stones are challenging to work with.
If the fragility of jade makes it challenging to work the stone finely enough for a dial, using it for a case might seem to challenge all the stone's powers of good luck and protection.
In later projects, like the United States Embassy in New Delhi and his own Manhattan townhouse, Stone challenged modernist orthodoxy by adorning facades with ornamental screens that evoked Oriental design.
After numerous failed attempts at winning the championship, Triple H and Mankind challenged WWF Champion Stone Cold Steve Austin to a Triple Threat match at SummerSlam, which featured Jesse "The Body" Ventura as the special guest referee.
But a meticulous new excavation of the site, being conducted by a team including on-site specialists in human and animal remains, fossil plants, pottery, and stone tools, is challenging the long-held assumption that the first settlements and the transition to agriculture were part of a single process dubbed the "Neolithic Revolution" (see p. 1446).
Additionally, removal of large stones may be challenging when using EPBD alone.
On the other hand, I'm a little more sanguine that it could work for Spanish or Italian, languages that present the kind of challenges Rosetta Stone's building blocks seem designed around.
2) Because the current data do not convincingly rule out other models, further support for the model is needed by challenging the model with additional stepping stone constructs.
