Values and facts
Ethics is concerned with judgements involving values not facts. Resolving how far it is to the flooded river is a question of fact, whereas whether or not the party should cross the river is an ethical dilemma. To solve the dilemma involves consideration of values as well as facts. As a consequence ethical decisions are difficult, they require the leader to consider what the preferred options may be, weighing up the advantages and disadvantages of each, as well as considering all the known and unknown facts.