Another example, analogue to Darrsi's. Bicycles again.
SRAM and Shimano components don't mix according to both the manufacturers manuals, data and recommendations. However, for one example, I've set up SRAM front derailleurs with Shimano front shifters to work perfectly fine - at least for both mine and the user's criteria. It just shifts as good as it shifts. When someone asks if it can work, I always say that it works "based on my knowledge and experience" (long way of saying IMO
). Just to be certain I've given a "full disclosure", since manufacturers say otherwise.
On the other hand, if someone asks if Deore brakes are better than the Acera ones (higher and lower class Shimano equipment), it is also my opinion that Deores are better. But since both the manufacturer, testers, practically any other mechanic etc. also claim the same, I don't bother stressing out that it's my opinion, or based on "my knowledge and experience".
In both those cases, all I can say when asked a question is my opinion. It is (IMO) understood that it's an honest one - liars and demagogues can be spotted by often using the words honest, honestly etc (again IMO - not a psychologist, sociologist or similiar).