Specifically (my emphasis)...
However, looking at 'uranium-processing' recipe results on factorio-data, you can see that amount and probability can co-exist...probability :: double (optional): A value in range [0, 1]. Item or fluid is only given with this probability; otherwise no product is produced.
Has no effect when amount is specified.
Code: Select all
{
name = "uranium-235",
probability = 0.007,
amount = 1
},