So extend the causal chain a little. After a certain number of consequences-of-consequences, it can’t be a trick of the eye, not in an integrated and causal world, you would have to have a fully convincing daylight hallucination or be faced with explaining a negative result.
Someone with anosognosia would just launch into a contrived explanation. So a positive result is as conclusive a clean bill of health as any analysis using human senses.
Of course, it’s absolutely inconceivable that, knowing what you expected, you turned toward the point where they met...
So extend the causal chain a little. After a certain number of consequences-of-consequences, it can’t be a trick of the eye, not in an integrated and causal world, you would have to have a fully convincing daylight hallucination or be faced with explaining a negative result.
Someone with anosognosia would just launch into a contrived explanation. So a positive result is as conclusive a clean bill of health as any analysis using human senses.