The following statement comes from Rand's book: Intro to Objectivist Epistemology
- With certain significant exceptions, every concept can be defined and communicated in terms of other concepts. The exceptions are concepts referring to sensations, and meta-physical axioms. --- -
Sensations are the primary material of consciousness and, therefore, cannot be communicated by means of the material which is derived from them. The existential causes of sensations can be described and defined in conceptual terms (e.g., the wavelengths of light and the structure of the human eye, which produce the sensations of color), but one cannot communicate what color is like, to a person who is born blind. To define the meaning of the concept "blue," for instance, one must point to some blue objects to signify, in effect: "I mean this." Such an identification of a concept is known as an "ostensive definition." OSTENSIVE definitions are usually regarded as applicable only to conceptualized sensations...
Consider trying to define red to a blind person???? What is the dictionary definition of the word red?? it is, the color red! There exist no other terms to describe it
Also, you'd face the same situation, should you try to define noise to a person that has been deaf from birth? not possible!
The following utube videos directly address this matter (conceptualized sensations)
Vsauce: Is my red the same as your red?
Tommy Edison is blind from birth. In this video he tries to understand color. From his perspective, our descriptions of colors MAKES NO SENSE WHATSOEVER!
explaining colors to a blind person: https://www.youtube.com/watch?v=91VUFVp1eXk
describing intangible concepts to a blind person: https://www.youtube.com/watch?v=NGYLAKYNVX8&ebc=ANyPxKoSU8V2BOBMuRtKrP48Gp7PY0b9hJKg_0OtY1HIPmDgW1Uu6Ahd11j_QSXgmphtoTPKUNaZGcNaEZTgcwxnHYDpjQ-roA&nohtml5=False
colorblind people seeing colors with special glasses: https://www.youtube.com/watch?v=csx_PHKJei8&ebc=ANyPxKorgGFh40hxxIa9wQieY9s8V0gAkLHKhswr_u9ZZXzMSgHeZAqEFX_3uhEnJejqzTQAo0X8xgTRn-jQtw4nXxY0grOoUg&nohtml5=False
Young girls sees colors for first time https://www.youtube.com/watch?v=HUuH3itKZ8E
man sees a colorful sunset for fist time and is moved to tears: https://www.youtube.com/watch?v=hCiP5bo4j4E&nohtml5=False
man sees colors for fist time and then is shown which colors are which (he is conceptualizing colors for the first time ever!): https://www.youtube.com/watch?v=jkyd-wNuFsw&ebc=ANyPxKrgLQ53ZBUBLzDl3dVDrBGp3YpvBFPyFPkjkooPedrXthySJHWWUlKwHyxLoGky-XeZ07ZV4DrsYr7TbT1jfnE9xiBg-Q&nohtml5=False
recieving en-chroma glasses (speaking in foreign language - Italian) yet you can still relate to; and understand the universal reactions. https://www.youtube.com/watch?v=ZjBP8U1BwEI&nohtml5=False
Video compilation of individuals hearing for the first time ever! an emotional tear jerker! (The adults cry happy tears - & the children react with joy! - even an infant) https://www.youtube.com/watch?v=PnnAIV4-SeM&ebc=ANyPxKrulafmj46WLJa2btq1syu3xZhaNwt_op69jjoso5qZd9rccKhcLIAc57LMb69Eq4Eg2i1xLNlN6CYco_rQxRZLRjHtOQ&nohtml5=False
Baby screams with joy upon hearing sounds for the first time https://www.youtube.com/watch?v=LB6C1e23vhU&nohtml5=False
Little girl hears her own voice for first time! https://www.youtube.com/watch?v=oyY2JfM1RlM
A woman hearing "MUSIC" for the first time ever (Bon Jovi) https://www.youtube.com/watch?v=1MV4uytD0Hk&nohtml5=False
A woman hearing "NOISE" for the first time ever https://www.youtube.com/watch?v=ymyt5s0btVk&nohtml5=False