nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqgn53v4qscdcdx8vkd86sq0d2q2ks4dzlusqz2ldu90j92k2zf07s9aa4ar (nprofile…a4ar) I believe you are confusing -- or consciously conflating -- understanding with ability.
By crude example, one can readily understand θ=cos−1(A/H), without having the ability to calculate it in one's head.
