If we want to randomly select a boolean value, we can use the world’s ‘choose true’ function (called boolean.next in some versions of Alice). For example, if we have a boolean variable, ‘ask’, which is true when we want an object to ask a question. Let’s assume we want the object to ask a question with a probability of 75%, then we could do the following:

1) set the value of ask using the choose true function and selecting 50% for ‘probability of true’. The Alice instruction would look something like:

o ask set value to choose true .5 (50%) of the time

o

2) Use ask as the condition in an if-else statement

As an example, see this Demo and Code.