Howdy, all! So recently I got into disputes with players about a situation that occurred in a tabletop game we are playing. I won't bore you with the details but it boils down to this: The effectiveness of an empty, wooden sheath in penetrating and impaling the human heart. A bit of additional information: 1: The sheath belongs to a 6" Kaiken, a Japanese type of dagger commonly used by feudal era women for self defense, and is unmodified except for the blade having been removed and a wooden tab being used to keep the grip and the sheath together. The sheath has a dull flat butt as it the norm with Japanese sheaths. 2: I found information saying that the breaking point of ribs are 150lbs/in^2, is this true and applicable for this situation? 3: Assume the possibility of superhuman strength. Their argument is split with them saying that anything can become a weapon with high enough stats and my argument is that the forces used would break the weapon before it accomplishes the goal. I want hard evidence to put an end to this.