>How do they know that, if the pcr tests are bunk?
PCR tests require cycling. As the number of cycles increases so does the possibility of amplifying noise in the form of extraneous DNA. As Dr. Mullis warned us a few years ago the test could be misused or misapplied and would return false positives if samples were over amplified by excessive cycling. For COVID the health authorities around the world recommended a cycle threshold that was quite high. This was done intentionally and fed a false narrative. It's not that pcr tests for COVID are bunk, rather the technology was misused and misapplied intentionally. CT (Cycle Threshold) is the key variable.
"Standard tests identify SARS-CoV-2 infections by isolating and amplifying viral RNA using a procedure known as the polymerase chain reaction (PCR), which relies on multiple cycles of amplification to produce a detectable amount of RNA. The CT value is the number of cycles necessary to spot the virus;"
https://www.science.org/content/article/one-number-could-help-reveal-how-infectious-covid-19-patient-should-test-results
>We're floating upon a sea of deceit.
Indeed.