it does not make any sense
No, flip effect activate when the card is flipped, which will be by Flip Summon, or being attacked, or flipped by an effect. Simply being destroyed while face down, will not 'flip' the monster.
They can, (unless the card that flipped it says "flip effects are not activated at this time.")
No, it is not considered a Summon. Therefore, the effects of cards such as Golem Sentry are not activated as it requires the card to be FLIP SUMMONED. However, it is considered to be "flipped" meaning that Flip Effect Monsters' effects are activated when successfully attacked.
A monster can't manually change battle position on the turn it declared an attack, but it can still be flipped face-down by an effect. Golem Sentry can attack, then activate its effect in main phase 2 and flip itself face down.
The past tense of flip is flipped.
No, a 'Flip Summon' is a manual change from face-down defence to face-up attack position in one of your main phases. If the monster is flipped from an attack, or by an effect, then this is a Flip, but not a Flip Summon. Therefore regular Flip Effect monsters like Night Assailant will trigger from being attacked, but monsters that require Flip Summoning like Guardian Sphinx will not.
No. A monster that is face down does not 'flip' when destroyed by a card effect, and will not trigger any flip effects.
No. Flip Effects only activate when the card is flipped, which will happen when Flip Summoned, or when the monster is attacked, or when an effect specifically directs it to be turned face up. Simply destroying a face-down monster, or removing it from play, does not 'flip' it, so Flip Effects will not activate.
No. Monsters are only ever flipped if they are Flip Summoned, attacked while face-down, or when a card effect specifically says they are flipped. Monsters are never considered flipped if destroyed, or tributed while face-down.
No, because it never gets flipped face-up. You can activate Raigeki Break to destroy an opponent's face-down Man-eater Bug without any monster on the field getting destroyed.
A monster flipped face-up by a card effect, such as "Book of Taiyou" or "Stop Defense", or as a result of battle is notconsidered a Flip Summon. Only flipping a Set monster manually is considered a Flip Summon.So if you attack a face-down Stealth Bird, it will be flipped but not Flip Summoned, so its effect will not activate.
No. Face-down monsters only flip under the following circumstances. - A monster declares an attack against it, the attack is not stopped, and the damage step is entered. The face-down monster will be flipped face-up. - The player that controls it Flip Summons it in his own main phase. - A card effect specifically says to flip the monster, such as Swords of Revealing Light. Monsters do not flip if targeted by a spell, and they do not flip if they are destroyed by an effect while face down.