Relatively strong claims are being made about transmission based on absence of evidence from contact tracing (CT) (e.g. CDC saying spreading from surfaces unlikely; little outdoor transmission; children rarely spread virus). Do CT methods bias against these modes of spread?

For example, if contact tracer asks: were you in enclosed space or did you have close contact w/ infected or sick person, one could easily miss outdoor or surface transmission, or from asymptomatic child.

To be clear: I'm not arguing there is evidence for these pathways. I am trying to understand what we can conclude from the absence of evidence (it often does not equate with evidence of absence!). @EmilyGurley3