Testator's soundness of mind

Article 799. To be of sound mind, it is not necessary that the testator be in full possession of all his reasoning faculties, or that his mind be wholly unbroken, unimpaired, or unshattered by disease, injury or other cause.

It shall be sufficient if the testator was able at the time of making the will to know the nature of the estate to be disposed of, the proper objects of his bounty, and the character of the testamentary act.

Article 800. The law presumes that every person is of sound mind, in the absence of proof to the contrary.

The burden of proof that the testator was not of sound mind at the time of making his dispositions is on the person who opposes the probate of the will; but if the testator, one month, or less, before making his will was publicly known to be insane, the person who maintains the validity of the will must prove that the testator made it during a lucid interval. (Civil Code of the Philippines)

[1] Even if the testator does not fully possess his reasoning faculties, he is still deemed of sound mind.

[2] Even if the testator's mind is not wholly unbroken or unimpaired, he is still deemed of sound mind.

[3] Even if the testator's mind is not unshattered by disease, injury or other cause, he is still deemed of sound mind.

[4] As long as the testator knows the nature of the estate to be disposed of, the proper objects of his bounty and the character of the testamentary act, he is deemed of sound mind.

[5] The law presumes the testator to be of sound mind. The one who insists on unsoundness of mind must prove.

[6] However, if, one month or less before the execution of the will, the testator has been publicly known to be insane, the presumption does not apply.