Click on the 'Link' to read about the myth: 
Myth #1: You should replace a dropped carabiner because of undetectable "Micro-Fractures".
Myth #2: If a harness has a belay loop for attachment, by-pass the belay loop with a carabiner; connecting the waist belt with the leg loops.
Myth #3: People stranded in a sit harness all have similar problems to overcome.
Myth #4: A High Strength Tie-off (Frictionless Hitch) needs 3 wraps around the anchor.
Myth #5: Dressing a knot makes the knot stronger.
Myth #6: A Figure 8 knot tied "backwards" is 10% weaker.
Myth #7: Racks should be used with the bars facing the user: i.e. facing the flat side of the rack.
Myth #8: Cleaning rope with a pressure washer drives the dirt particles deep into the fibers.
Myth #9: Walking on rope damages it.
Myth #10: Personal recreation vertical gear / descent devices are suitable for commercial applications such as ropes courses, climbing walls, and industrial applications.
Myth #11: Opposite and opposing carabiners used in conjunction establish a more secure connection.
Myth #12: While climbing, body belays are preferred.
Myth #13: 15 to 1 is the NFPA (National Fire Protection Association) safety standard.
Myth #14: Prusik cord lengths should be standard.
Myth #15: Rope strength can be determined by looking at the manufacturer’s
documents.
Myth #16: Belays are required.
Myth #17: Knots should be backed up.
Myth #18: Double Loop Knots are stronger.
Myth #19: Gibbs Ascenders are good for commercial and cable applications
Myth #20: The Rule of 12 applies to both high line tensioning and haul systems.