The person he/she/they is responding to may not have originated the thought, but the quote this poster is responding to is very clear from context. It reads as

The person he/she/they is responding to may not have originated the thought, but the quote this poster is responding to is very clear from context. It reads as follows: “The authors feel that, in light of this preponderance of circumstantial evidence, the hypothesis that the biogenesis of SARS-CoV-2 involved human intervention should be seen as the leading (i.e. most likely) explanation.”