Before revision:  For purposes of inferring biological networks, the main advantage of microarray technology over low-throughput methods may be that the representation of a large enough portion of the genome enables computation of an informative upper bound of how much confidence one may reasonably place in causal relationships between genes on the basis of observed data.
After revision:  For purposes of inferring biological networks, the main advantage of microarray technology over low-throughput methods may be that the representation of a sufficiently large portion of genome enables computation of an informative upper bound of how much confidence one may reasonably place in causal relationships between genes on the basis of observed data.