Too many students lack the luxuries of time and effort to mull exercises and problems. They must juggle MULTIPLE jobs to pay exorbitant tuition fees. Single parents or adult learners must prioritize their children or full time job. Presume these unquestionable harsh realities in the USA — please don't challenge these postulates herein.
They admit to me — after reading the textbook or watching lectures, they dive right into perusing full solutions, then asking questions about the full solution that bewilder them.
But they reaffirm this time saving method is craftier, and DOESN'T harm their learning or grades one tad! Rather than spending $t_1$ on attempting the solution (which they completely lack in reality), then $t_2$ on understanding parts of the solution that befuddle them — they find it shrewder to skip $t_1$ and start at $t_2$.
Are these students correct? Any peer reviewed evidence? Can commencing with, and tearing into, the full solutions — before and without attempting to solve exercises or problems at all — improve your learning and grades?