Final answer:
Oscar's speeding ticket costs in his taxi business are not tax deductible because they are due to violations of law and not considered ordinary and necessary expenses.
Step-by-step explanation:
Oscar's speeding ticket costs in the context of his taxi business would not be tax deductible. The costs incurred from speeding tickets are not considered ordinary and necessary expenses directly related to the business, and they are due to violations of law. Therefore, the costs do not meet the criteria for being deductible as a business expense.