. if the liability 2019s fair value cannot be reasonably estimated , then the entity must disclose ( 1 ) a description of the obligation , ( 2 ) the fact that a liability has not been recognized because the fair value cannot be reasonably estimated and ( 3 ) the reasons why the fair value cannot be reasonably estimated . fin no . 47 also clarifies when an entity would have sufficient information to reasonably estimate the fair value of an asset retirement obligation . marathon adopted fin no