The problem lies in the fact that no one , until now , not even the PGA -- has identified which technique is ideal according to the laws of motion .
They have not told us exactly how it should function , or the best way to learn it .
The problem lies in the fact that no one , until now , not even the PGA -- has identified which technique is ideal according to the laws of motion , nor have they told us exactly how it should function , or the best way to learn it .