Trivial objections is an informal logical fallacy where irrelevant and sometimes frivolous objections are made to divert the attention away from the topic that is being discussed. This type of argument is called a "quibble" or "quillet".
Trivial objections are a special case of red herring.

The fallacy often appears when an argument is difficult to oppose. The person making a trivial objection may appear ready to accept the argument in question, but at the same time they will oppose it in many different ways. These objections can appear in the form of lists, hypotheticals, and even accusations.

Such objections themselves may be valid, but they fail to confront the main argument under consideration. Instead, the objection opposes a small, irrelevant part of the main argument. The fallacy is committed because of this diversion; it is fallacious to oppose a point on the basis of minor and incidental aspects, rather than responding to the main claim.

Example:

Amy: (after consulting a reliable source): It really looks like a cucumber is a fruit, not a vegetable.

Bob: You're an idiot! Why would you use 'really' in that sentence?