There are now 1700 Architects and Engineers for 9/11 Truth. One could say that this constitutes a small minority of the total number of current architects and engineers, which is true. A more interesting question would be what percentage of architects and engineers are against 9/11 "Truth" ("Truth" in this case would refer to an alternative version of events than the official version). And a still more interesting question would be what percentage of those architects and engineers who are against 9/11 "Truth" have examined the evidence presented by 9/11 Architects and Engineers for 9/11 "Truth?"
But if my criterion for when to challenge the Consensus is accepted (and as yet nobody has challenged my criterion), if even one architect or engineer challenged the official version of 9/11, this would be grounds for us to challenge the official version, also. Given that there are 1,699 additional experts that challenge the official version, so much stronger are the grounds for us to challenge it as well.