I’m thinking of James 3:1 here.
Not many of you should become teachers, my fellow believers, because you know that we who teach will be judged more strictly.
As I say, it’s a matter of trust. When you are learning from a teacher, you are trusting them that they have done their due diligence, to the best of their ability, in making sure that what they are teaching you is accurate. If they are teaching things that you later find out that they should reasonably have been expected to know to be false, given their level of education and their actual or claimed authority to teach about such things, it is only reasonable to conclude that they have committed a breach of that trust. The more blatant and egregious the falsehood, the harder it is to excuse it.
It’s also worth considering this discussion that we had a few years ago on the extent to which we should assume good faith on the part of young earth advocates:
Thanks for the link. They point out that Andrew Snelling has indeed acknowledged the existence of the cracks in question. However it is worth noting that his acknowledgement of the fractures is only made in a lengthy technical report that was published in 2021. The dodgy photograph, and the claim that the rock formation in question was not fractured, is in a popular-level article that is one of a series that frequently gets re-posted on their Facebook feed and that of their supporters and that was first published in 2012. The thread on this forum discussing this misrepresentation was in September 2017.
The assertion that the rock formation was not fractured is spelt out explicitly in the popular-level article, in the caption of the photograph itself:
Photo 1: The whole sequence of sedimentary layers through which Grand Canyon cuts has been bent and folded without fracturing. This includes the Tapeats Sandstone, located at the bottom of the sequence. (A 90° fold in the eastern Grand Canyon is pictured here.)
As of today, this article has not been updated to correct it, though it does have a link to the technical report at the bottom. I am not aware of any acknowledgement of the fractures by Snelling et al that predates our 2017 discussion, though if someone can provide a link to one I will be happy to acknowledge it.