I was contrasting ““Additive accumulation of displacement at a constant rate ...” with the quoted phrase, as a starting point you see, describing constant speed, in contrast to “additive accumulation of displacement at an increasing rate” which aptly describes constant acceleration.
Increasing rate is not the same as constant rate.
The original #85:
“The accumulation can be additive at an increasing rate resulting in an exponential yield.”
Nothing was mentioned of displacement or constant acceleration. Thrust is not the same as displacement. Increasing rate may also refer to increasing acceleration. The descriptor ‘increasing rate’ is more general than constant rate or constant acceleration.
The remarks were made to counter a potential misunderstanding that a minuscule thrust yield per power input rendered the development much ado about nothing.
The remarks made the point that small yields in thrust could be additive at an increasing rate similar to neutron flux chain reactions to yield exponential energy yield from small mass defect calculations.
For the untrained person, the discussion can talk about scaling up from a small amount, that the discovery of a very small amount of something valuable is significant because the process can be scaled up; it is scalable. Hence, one shouldn’t be misled to believe the discovery is not worthy of further development.