Re: Identifying double gutshots easily
 

For Type F, you have the board and pocket cards reversed.

It should also be noted that some of these gutshots are very weak. The weakest would be Type B where you hit the upper end and essentially have one card at the idiot's end of the straight.

Obviously, using both your hole cards is stronger than using a four board cards.

As well, some hits would be very disguised and thus have much greater implied odds. Hitting the lower end of Type A would be very good giving you the nuts and a not so obvious hand.

The OP was asking about recognizing the double gutter but on top of that I would suggest he needs to assess the implied odds of his double gutter because they are not all the same as far as concealment and strength.