I think the question was less about the efficacy of ABS, and more about the failure mode. Is it possible for the ABS system to "fail open" unintentionally, such that depressing the brake pedal has no effect whatsoever?
There is no credible way to answer that question. Analysis cannot prove the absence of such a flaw. All we have are records, and those are incomplete. What we can say is that there is no record of ABS “fail-open” flaws plaguing passenger vehicle designs, and the record is now rather long.
topspin|5 months ago