ASTRO
In the literature: open
How many interstellar objects are there, and of what sizes?
In plain words
Each detection gives an estimate of how many such bodies fill space between the stars. This tells how much material planetary systems throw out while forming.
Precise statement
Determine the space density $n(>D)$ and size distribution of interstellar objects near the Sun; the detection of 1I implied $n \sim 0.1-0.2\,\mathrm{AU}^{-3}$ for $D >\sim 100\,\mathrm{m}$. Convert this into the mass of solids ejected per star and compare with planet-formation ejection models. The answer is $n(>D)$ with uncertainty and the inferred ejected mass per star.
What would settle it
A detection rate with a well-characterized selection function from Rubin Observatory LSST over several years.