  Recently, the LIGO-Virgo Collaboration (LVC) concluded that there is no
evidence for lensed gravitational waves (GW) in the first half of the O3 run,
claiming "We find the observation of lensed events to be unlikely, with the
fractional rate at $\mu>2$ being $3.3\times 10^{-4}$". While we agree that the
chance of an individual GW event being lensed at $\mu>2$ is smaller than
$10^{-3}$, the number of observed events depends on the product of this small
probability times the rate of mergers at high redshift. Observational
constraints from the stochastic GW background indicate that the rate of
conventional mass BBH mergers (8 < M (M$_{\odot}$) < 15) in the redshift range
1<z< 2 could be as high as O($10^7$) events per year, more than sufficient to
compensate for the intrinsically low probability of lensing. To reach the LVC
trigger threshold these events require high magnification, but would still
produce up to 10 to 30 LVC observable events per year. Thus, all the LVC
observed ordinary stellar mass BBH mergers from this epoch must be strongly
lensed. By adopting low-rates at high redshift, LVC assumes that lensed events
can not be taking place, thus incorrectly assigning them a closer distance and
higher masses by a factor of a few (typically 2 to 5). The LVC adopted priors
on time delay are in tension with the distribution of observed time delays in
lensed quasars. Pairs of events like GW190421-GW190910 and GW190424-GW190910,
which are directly assigned a probability of zero by LVC, should be instead
considered as prime candidates to be strongly lensed GW pairs, since their
separation in time is consistent with observations of time delays in lensed
quasars. Correcting for the LVC wrong Bayesian priors, maximum merger rate of
conventional mass BBH in 1<z<2, and gravitational lensing time-delay model,
reverses the LVC conclusions and supports the strong gravitational lensing
hypothesis.
