1.   Leavitt, an inveterate tinkerer with the air of an absent-minded professor, set his mind to work on the asleep-at-the-wheel conundrum.

2.   Newton, an inveterate tinkerer, is forever playing with ab exercises.

3.   Strock, who grew into an inveterate tinkerer and biomedical inventor, graduated from Boston Latin School, Dartmouth College and the Harvard School of Dental Medicine.

4.   The California Ivesians have all been, to a certain extent, inveterate tinkerers.