There really was no explanation as to why Liquid was told false information. I remember that Raymond Benson novel had Paramedic say something like "what if we told the dominant one it was inferior" like would it really affect it's potential. Although the novel isn't exactly canon. Whatever it was, it's to coincide with the main theme of MGS1 to "not be ruled by your genes." Snake is genetically inferior, but it didn't matter.
Did you even watch the video? It's to "encourage strong fetal growth."
can you explain in a more scientific manner? something like killing your six potential siblings will cause the remaining 2 to buck up & grow up? like there's some sort of link between those eggs?
anyway i believe there's some sort of name or codes given to the eggs, and i highly suspect David & Confidential was their designation from the start, unless you can come up with some sort of 10 digit codes. or am i hearing Solid & Liquid?