Sonetimes when some one "catches" us in a foolish act or claim, we try to shift the blame by the retort, "Yore igurunt!".

And "Ignorance of the Law is no excuse!" is a popular warning of the past.

At best, ignorance is only an excuse (unless this is a "mental" disability) for a past misstep, but, now forewarned, "The clock is running!"