21.   OK, so some phenomena defy explanation.

22.   Ruth had undergone a mysterious personality change that defied psychiatric explanation.

23.   Some things in life just defy explanation.

24.   Sometimes, employees go so far beyond the call of duty that their behavior seems to defy rational explanation.

25.   Some of the floundering defies explanation.

26.   Some things defy explanation.

27.   Such acts defy explanation, but Sivan attempts to find one by burrowing in on the fragile logic of someone who chooses to be a martyr for a cause.

28.   Talk about defying logical explanation.

29.   The arrangement of the bodies, accompanied by gold, bronze and ceramic grave goods, seems to defy ready explanation.

30.   The global surge in women officeholders defies simple explanations, although three interconnected factors seem to stand out.