Hi Jacques, I take your point but I would suggest that the test is that of " a reasonable man" and not an expert in sword matters.In other words if a reasonable man cannot detect the flaw or defect then I believe .rightly or wrongly, that there is an obligation to disclose ,much the same as with latent defects which the seller may be aware of and which are not apparent on close examination.I respond not to prove a point but simply to alert members that there is another viewpoint which provides them with a right of recourse.Peter