Based on the input provided, come up with a joke.
A scientist and an engineer
Why don't scientists trust engineers? Because their works always end with "In theory..." while the engineers always start with "In practice..."
Complete the following task based on the instruction and optional input provided.### Instruction:
Based on the input provided, come up with a joke.

### Input:
A scientist and an engineer

### Output:
Why don't scientists trust engineers? Because their works always end with "In theory..." while the engineers always start with "In practice..."