@Scott12Colin So to prove that their default mode was to assume all three of them had got it, here he is talking about reducing the risk to others. This is very big in his reasoning. How does he reduce the risk to others of Coronavirus? Well we find out in the conclusion. 
@Scott12Colin When he provides his solution it involves a solution where he claims neither his wife *or* son could infect anyone. This is very clearly an indication that their default mode was to assume all three of them had got it. He is asserting a solution to the risk that he first raised.
@Scott12Colin And the final piece of evidence that suggests that their default mode was to assume all three of them had it comes from Dominic Cummings himself who said:
"obviously our default mode was: assume that all three of us had got it"
Which is pretty conclusive, I think.
"obviously our default mode was: assume that all three of us had got it"
Which is pretty conclusive, I think.
