Posing A Challenge Crossword Clue

We think the answer is "TESTING" which means:

noun
• • The act of subjecting to experimental test in order to determine how well something works
• • An examination of the characteristics of something
• • The act of giving students or candidates a test (as by questions) to determine what they know or have learned
verb
• • To challenge.
• • To refine (gold, silver, etc.) in a test or cupel; to subject to cupellation.
• • To put to the proof; to prove the truth, genuineness, or quality of by experiment, or by some principle or standard; to try.
• • (academics) to administer or assign an examination, often given during the academic term, to (somebody).
• • To place a product or piece of equipment under everyday and/or extreme conditions and examine it for its durability, etc.
• • To be shown to be by test.
• • To examine or try, as by the use of some reagent.
• • To attest (a document) legally, and date it.
• • To make a testament, or will.
adjective
• • Difficult, tough

An example sentence would be:

• • "The teacher is grading the testing papers."
• • "The testing of the new software revealed several bugs."

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