One great engineers contributions last forever, assuming they become part of a product that is stable enough to be reverse engineered (so software and physical both count) and is proportionate to Contribution*product. One great teachers contribution rots due to reversion to the mean.
The average teacher almost certainly has a greater marginal effect than the engineer. The 90th percentile engineer kicks the teachers ass.
The average teacher almost certainly has a greater marginal effect than the engineer. The 90th percentile engineer kicks the teachers ass.